Grinders
G1 HOR EXT DIE GRINDER, 1/4" COLLET
IR G1X200RG4
Extended Air Die Grinder, 20,000 RPM, 0.4 HP, 1/4" Collet, Rear Exhaust
The G1 Series Die Grinders feature a vane motor and a lightweight, composite housing that can stand up to harsh temperature changes. Compatible with piped-away exhaust kits, this powerful tool allows you to switch between front, rear and dual exhaust options.Features And Benefits
- Durability: Made to withstand repeated drops, harsh chemicals and tough work environments, this tool is ready to work whenever, wherever.
- Reliability: Built to last, this tool performs well job after job, which is why it's right at home in shipbuilding, heavy machinery, railroad, oil and gas, body shops and even aerospace environments.
- Comfort: Whether you're repairing a car or building a house, these die grinders have a comfortable, ergonomic body shape that ensures you'll get more done with less fatigue.
Includes: Tools, Large Wrench, Small Wrench
Product Application and Uses: Light material removal, cleaning rough castings, deburring parts, cleaning up welds, and other finishing tasks
Actuation/Throttle Type/Switch Location: Handle
Actuation/Throttle Type/Switch Type: Safety Lever
Air Consumption @ Load (cfm): 25
Air Consumption @ Load (l/min): 708
Air Inlet: 1/4" NPT
Air Pressure (psi): 90
Arbor/Collet: 1/4"
Bearing Type: Ball Bearing
Color: Black
Configuration/Handle Type: Straight
Duty Rating: Heavy Duty
Exhaust Location: Rear
Grinder Type: Die Grinder
Guard Material: Steel
Handle Material: Composite
Height Over Spindle (in): 1.73
Housing Material: Composite
Lock Mechanism: Lever lock in off position
Max Free Speed (rpm): 20000
Max Pressure (bar): 6.2
Min Hose Size (in): 3/8
Power Source: Air Powered
Product Length (in): 9.13
Product Weight (lb): 1.3
Rated Power (hp): 0.4
Sound Pressure/Power Db(A): 82.3 / 93.2
Vibration Level (m/s2): <2.5
Warranty: 1-year
Similar IR
- G1X250RG4
Right Angle Grinder
DC 12LF280-36
RA SNDR/GRD,RE,12K,1/4" COLLET- Composite housing
- Wide array of speeds; front and rear exhaust models available
- Ergonomic and balanced design minimized operator fatigue
- OH version includes 4ft overhose for additional noise suppression
- Conversion kits available to add OH Overhose on rear exhaust tools for additional noise suppression
Exhaust: Rear
Tool Configuration: Right Angle
Type Housing: Composite
Weight (lbs): 1.1 lb
All tools performance rated @ 90 psi / 620 kPa air pressure. Standard Equipment: Applicable collet, collet wrenches Minimum Hose I.D.: 1/4 in / 4.8 mm
RA Sander/Grinder, 12K, 1/4in Collet
DC 12LF200-36
RA SNDR/GRD,12K,1/4" COLLET- Composite housing
- Wide array of speeds; front and rear exhaust models available
- Ergonomic and balanced design minimized operator fatigue
- OH version includes 4ft overhose for additional noise suppression
- Conversion kits available to add OH Overhose on rear exhaust tools for additional noise suppression
Exhaust: Front
Tool Configuration: Right Angle
Type Housing: Composite
Weight (lbs): 1.1 lb
All tools performance rated @ 90 psi / 620 kPa air pressure. Standard Equipment: Applicable collet, collet wrenches Minimum Hose I.D.: 1/4 in / 4.8 mm
G1 HOR EXT DIE GRINDER, 1/4" COLLET
IR G1X250RG4
Extended Air Die Grinder, 25,000 RPM, 0.4 HP, 1/4" Collet, Rear Exhaust
The G1 Series Die Grinders feature a vane motor and a lightweight, composite housing that can stand up to harsh temperature changes. Compatible with piped-away exhaust kits, this powerful tool allows you to switch between front, rear and dual exhaust options.Features And Benefits
- Durability: Made to withstand repeated drops, harsh chemicals and tough work environments, this tool is ready to work whenever, wherever.
- Reliability: Built to last, this tool performs well job after job, which is why it's right at home in shipbuilding, heavy machinery, railroad, oil and gas, body shops and even aerospace environments.
- Comfort: Whether you're repairing a car or building a house, these die grinders have a comfortable, ergonomic body shape that ensures you'll get more done with less fatigue.
Includes: Tools, Large Wrench, Small Wrench
Product Application and Uses: Light material removal, cleaning rough castings, deburring parts, cleaning up welds, and other finishing tasks
Actuation/Throttle Type/Switch Location: Handle
Actuation/Throttle Type/Switch Type: Safety Lever
Air Consumption @ Load (cfm): 25
Air Consumption @ Load (l/min): 708
Air Inlet: 1/4" NPT
Air Pressure (psi): 90
Arbor/Collet: 1/4"
Bearing Type: Ball Bearing
Color: Black
Configuration/Handle Type: Straight
Duty Rating: Heavy Duty
Exhaust Location: Rear
Grinder Type: Die Grinder
Guard Material: Steel
Handle Material: Composite
Height Over Spindle (in): 1.73
Housing Material: Composite
Lock Mechanism: Lever lock in off position
Max Free Speed (rpm): 25000
Max Pressure (bar): 6.2
Min Hose Size (in): 3/8
Power Source: Air Powered
Product Length (in): 9.13
Product Weight (lb): 1.3
Rated Power (hp): 0.4
Sound Pressure/Power Db(A): 83.1 / 94.1
Vibration Level (m/s2): <2.5
Warranty: 1-year
Similar IR
- G1X200RG4
- 5208MAX
.7 HP STRAIGHT-LINE DIE GRINDER, CENTRAL
DY 56759
.7 hp Straight-Line Die Grinder, Central Vacuum15,000 RPM, Gearless, Rear Exhaust, 1/4in and 6 mm Collets, Extended Muffler
Dynabrade .7 hp Vacuum Die Grinders are ideal for rapid material removal, finishing, removing parting-lines and flash.
For use with carbide burrs, rotary files, mounted points, roll cartridges, wheels and discs. Sold separately.
- HP: 0.7
- Max. RPM: 15000.0
- Motor RPM: 15,000
Grinder, Extended 1/4in Angle Die
MPT G14990RE4-C4
Grinder, Extended 1/4in Angle Die.7 hp 7 Degree Offset Die Grinder 20, 000Rpm, Gearless
DY 52242
.7 hp 7 Degree Offset Die Grinder20,000 RPM, Gearless, Front Exhaust, Long Shank, 1/4in and 6mm Collets
Includes 1/4in (50013) and 6 mm (50016) Collet Inserts, fits optional 1/8in (50065), 3/8in (50014), 8 mm (50039)
Gearless motors decrease downtime and lessen repair expense when compared to geared tools.
- HP: 0.7
- Max. RPM: 20000.0
- Motor RPM: 20000
G1 ANGLE DIE GRINDER, 1/4" COLLET, REAR EXHAUST
IR G1A200RG4
Angle Air Die Grinder, 20,000 RPM, 0.4 HP, 1/4" Collet, Rear Exhaust
The G1 Series Die Grinders feature a vane motor and a lightweight, composite housing that can stand up to harsh temperature changes. Compatible with piped-away exhaust kits, this powerful tool allows you to switch between front, rear and dual exhaust options.Features And Benefits
- Durability: Features a vane motor and a lightweight, composite housing made to withstand repeated drops, harsh chemicals and tough work environments, this tool is ready to work whenever, wherever.
- Comfort: Whether you're repairing a car or building a house, these die grinders have a comfortable, ergonomic D-shaped grip that ensures you'll get more done with less fatigue.
- Ideal for light material removal, cleaning rough castings, deburring parts, cleaning up welds, and other finishing tasks.
- One-nut access for all motor servicing.
- Patent-pending soft-mount system reduces vibration for extended motor and switch life.
- Compatible with piped-away exhaust kits, this powerful tool allows you to switch between front, rear and dual exhaust options.
Includes: Tool, (2) Collet Wrenches, Manuals
Product Application and Uses: Cleaning Rough Castings, Cleaning Up Welds, Deburring Parts, Finishing Tasks, Ideal For Light Material Removal
Actuation/Throttle Type/Switch Location: Top;Bottom (straight tool)
Actuation/Throttle Type/Switch Type: Lever
Air Consumption @ Load (cfm): 25
Air Consumption @ Load (l/min): 708
Air Inlet: 1/4" NPT
Air Pressure (psi): 90
Arbor/Collet: 1/4"
Bearing Type: Ball Bearing
Color: Black
Configuration/Handle Type: Right Angle
Duty Rating: Heavy Duty
Exhaust Location: Rear
Grinder Type: Die Grinder
Handle Material: Composite
Height Over Spindle (in): 3.1
Lock Mechanism: Lever lock in off position
Max Free Speed (rpm): 20000
Max Pressure (bar): 6.2
Min Hose Size (in): 3/8
Power Source: Air Powered
Product Length (in): 6
Product Width (in): 12.5
Product Height (in): 2.5
Product Weight (lb): 1.1
Rated Power (hp): 0.4
Right Angle Length (in): 3
Right Angle Length (mm): 76
Side to Center Distance (in): 0.54
Side to Center Distance (mm): 14
Sound Pressure/Power Db(A): 83.6 / 94.6
Speed Setting: Variable Speed
Standards/Certifications: 2006/42/Ec, En Iso 28927-12, En Iso 15744
Vibration Level (m/s2): 5.6
Warranty: 1-year
Wheel Type: Burr
Similar IR
- M2A180RG4
- G1A120RG4
- G1A200FG4
Grinder w/Rear Exhaust w/ Whip hose, 7500RPM, 1.28hp
AIM SG-125H-1M-R
Grinder w/Rear Exhaust w/ Whip hose, 7500RPM, 1.28hp1 STRAIGHT-LINE DIE GRINDER
DY 52665
1 hp Straight-Line Die Grinder9,000 RPM, Gearless, Rear Exhaust, 1/4in and 6mm Collets
Includes 1/4in Collet Insert (50013), fits optional 1/8in (50065), 3/8in (50014), 6 mm (50016), 8 mm (50039)
Gearless for reduced maintenance and downtime.
- HP: 1.0
- Max. RPM: 9000.0
- Motor RPM: 9000
1STRAIGHT-LINE DIE GRINDER
DY 52667
1 hp Straight-Line Die Grinder15,000 RPM, Gearless, Rear Exhaust, 1/4in and 6mm Collets
Includes 1/4in Collet Insert (50013), fits optional 1/8in (50065), 3/8in (50014), 6 mm (50016), 8 mm (50039)
Gearless for reduced maintenance and downtime.
- HP: 1.0
- Max. RPM: 15000.0
- Motor RPM: 15000
Die Grinder, Gearless, 12, 000 rpm
DY 52666
1 hp Straight-Line Die Grinder12,000 RPM, Gearless, Rear Exhaust, 1/4in and 6mm Collets
Includes 1/4in Collet Insert (50013), fits optional 1/8in (50065), 3/8in (50014), 6 mm (50016), 8 mm (50039)
Gearless for reduced maintenance and downtime.
- HP: 1.0
- Max. RPM: 12000.0
- Motor RPM: 12000
Die Grinder Straight 1Hp, 1/4 Collet
DY 52669
1 hp Straight-Line Die Grinder20,000 RPM, Gearless, Rear Exhaust, 1/4in and 6mm Collets
Includes 1/4in Collet Insert (50013), fits optional 1/8in (50065), 3/8in (50014), 6 mm (50016), 8 mm (50039)
Gearless for reduced maintenance and downtime.
- HP: 1.0
- Max. RPM: 20000.0
- Motor RPM: 20000
Die Grinder, 1/4 Collet, 18000 Rpm
DY 52668
1 hp Straight-Line Die Grinder18,000 RPM, Gearless, Rear Exhaust, 1/4in and 6mm Collets
Includes 1/4in Collet Insert (50013), fits optional 1/8in (50065), 3/8in (50014), 6 mm (50016), 8 mm (50039)
Gearless for reduced maintenance and downtime.
- HP: 1.0
- Max. RPM: 18000.0
- Motor RPM: 18000
GRINDER
IR GH011A-600-1
Air Pencil Grinder, 60,000 RPM, 0.1 HP, 1/8" Collet
A durable metal housing and powerful vane motor give the Ingersoll Rand Pencil Grinders the ability to succeed in a variety of projects, from general repair work to precision aerospace projects. Slide throttle and twist throttle actuation bring added flexibility to any job.Features And Benefits
- Comfort: Lightweight at 2.6 lbs. with a rubber grip, this tool’s ease of use makes longer jobs easier.
- Access: True to its name, this pencil-thin grinder can reach the tightest of spaces, leaving no work left undone.
- Versatile: A durable metal housing and powerful vane motor give this pencil grinder the ability to succeed in a variety of projects, from general repair work to precision aerospace projects. Slide throttle and twist throttle actuation bring added flexibility to any job.
Includes: (1) Tool; (2) Wrench; (1) Hose Assy; (1) Sleeve Exhaust
Product Application and Uses: Final Cleaning And Polishing Of Dies, Mold Finishing, Intricate Grinding Applications, Light Deburring And Flash Removal
Actuation/Throttle Type/Switch Type: Twist
Air Consumption @ Load (cfm): 7
Air Consumption @ Load (l/min): 198
Air Inlet: 1/4" NPT
Air Pressure (psi): 90
Arbor/Collet: 1/8"
Average Air Consumption (cfm): 7
Average Air Consumption (l/min): 3.3
Bearing Type: Ball Bearing
Color: Silver
Configuration/Handle Type: Straight
Duty Rating: Heavy Duty
Exhaust Location: Rear
Grinder Type: Pencil Grinder
Gripping Length (in): 2.4
Housing Material: Steel
Max Free Speed (rpm): 60000
Max Pressure (bar): 6.2
Min Hose Size (in): 1/4
Pencil Diameter (in): 0.68
Power Source: Air Powered
Product Length (in): 5.3
Product Width (in): 6.5
Product Height (in): 2.3
Product Weight (lb): 2.6
Rated Power (hp): 0.1
Side to Center Distance (in): 0.34
Side to Center Distance (mm): 9
Sound Pressure/Power Db(A): 76
Speed Setting: Variable Speed
Spindle Offset (in): 0.34
Standards/Certifications: 2006/42/Ec, En Iso 28927-12, En Iso 15744
Vibration Level (m/s2): 3.2
Warranty: 1-year
Wheel Type: Burr
Whip Hose (in): 7/32
Similar IR
- 7978
- 320PG
- 320PGK
G1 ANGLE DIE GRINDER, 1/4" COLLET, REAR EXHAUST
IR G1A120RG4
Angle Air Die Grinder, 12,000 RPM, 0.4 HP, 1/4" Collet, Rear Exhaust
The G1 Series Die Grinders feature a vane motor and a lightweight, composite housing that can stand up to harsh temperature changes. Compatible with piped-away exhaust kits, this powerful tool allows you to switch between front, rear and dual exhaust options.Features And Benefits
- Durability: Features a vane motor and a lightweight, composite housing made to withstand repeated drops, harsh chemicals and tough work environments.
- Comfort: Whether you're repairing a car or building a house, these die grinders have a comfortable, ergonomic D-shaped grip shape that ensures you'll get more done with less fatigue.
- Ideal for light material removal, cleaning rough castings, deburring parts, cleaning up welds, and other finishing tasks.
- One-nut access for all motor servicing
- Patent-pending soft-mount system reduces vibration for extended motor and switch life.
- Compatible with piped-away exhaust kits, this powerful tool allows you to switch between front, rear and dual exhaust options.
Includes: Tool, (2) Collet Wrenches, Manuals
Product Application and Uses: Cleaning Rough Castings, Cleaning Up Welds, Deburring Parts, Finishing Tasks, Ideal For Light Material Removal
Actuation/Throttle Type/Switch Location: Top;Bottom (straight tool)
Actuation/Throttle Type/Switch Type: Lever
Air Consumption @ Load (cfm): 19
Air Consumption @ Load (l/min): 538
Air Inlet: 1/4" NPT
Air Pressure (psi): 90
Arbor/Collet: 1/4"
Bearing Type: Ball Bearing
Color: Black
Configuration/Handle Type: Right Angle
Duty Rating: Heavy Duty
Exhaust Location: Rear
Grinder Type: Die Grinder
Handle Material: Composite
Height Over Spindle (in): 3.1
Lock Mechanism: Lever lock in off position
Max Free Speed (rpm): 12000
Max Pressure (bar): 6.2
Min Hose Size (in): 3/8
Power Source: Air Powered
Product Length (in): 6
Product Width (in): 12.5
Product Height (in): 2.5
Product Weight (lb): 1.1
Rated Power (hp): 0.4
Right Angle Length (in): 3
Right Angle Length (mm): 76
Side to Center Distance (in): 0.54
Side to Center Distance (mm): 14
Sound Pressure/Power Db(A): 82.4 / 93.4
Speed Setting: Variable Speed
Standards/Certifications: 2006/42/Ec, En Iso 28927-12, En Iso 15744
Vibration Level (m/s2): 3.4
Warranty: 1-year
Wheel Type: Burr
Similar IR
- M2A120RG4
- G1A200RG4
- G1A120FG4
Die Grinder 1/4in Collet
DY 52290
.7 hp 7 Degree Offset Die Grinder20,000 RPM, Gearless, Front Exhaust, Short Shank, 1/4in and 6mm Collets
High-Quality Air-Powered Die Grinder 7 Degree Offset, Long Shank, Gearless, Front Exhaust Model
Gearless for reduced maintenance and downtime.
- HP: 0.7
- Max. RPM: 20000.0
- Motor RPM: 20000
.1 HP STRAIGHT-LINE PENCIL GRINDER, CENT
DY 51622
.1 hp Straight-Line Pencil Grinder, Central Vacuum35,000 RPM, Turbine Air Motor, Rear Exhaust, 1/8in Collet
Tool has integrated collet with 1/8in Collet Insert (51659)
Turbine-Driven Air Motor Models are ideal for precision deburring and finishing on a variety of surfaces. High-efficiency air motor has no wearable gears, vanes or blades. Oil-free operation minimizes maintenance time and repair costs. Air motor is controlled with patented governor, providing constant tool speed under load. Quality high-speed bearings are included.
- HP: 0.1
- Max. RPM: 35000.0
- Motor RPM: 35,000
.1 hp Straight-Line Extension Pencil Grinder 35, 000 RPM, Turbine Air Motor, Rear Exhaust, 1/8 Collet
DY 51756
.1 hp Straight-Line Extension Pencil Grinder35,000 RPM, Turbine Air Motor, Rear Exhaust, 1/8in Collet
Tool has integrated collet with 1/8in Collet Insert (51659)
Turbine-Driven Air Motor Models are ideal for precision deburring and finishing on a variety of surfaces. High-efficiency air motor has no wearable gears, vanes or blades. Oil-free operation minimizes maintenance time and repair costs. Air motor is controlled with patented governor, providing constant tool speed under load. Quality high-speed bearings are included.
- HP: 0.1
- Max. RPM: 35000.0
- Motor RPM: 35000
Grinder
AA 7978
Air Pencil Grinder, 60,000 RPM, 0.1 HP, 1/8" or 1/4" Collet, Front Exhaust
Description: A durable metal housing and powerful vane motor give the Ingersoll Rand Pencil Grinders the ability to succeed in a variety of projects, from general repair work to precision aerospace projects. Slide throttle and twist throttle actuation bring added flexibility to any job.
Features And Benefits:
- Comfort: Lightweight and easy to handle, this tool’s ease of use makes longer jobs easier.
- Access: True to its name, this pencil-thin grinder can reach the tightest of spaces, leaving no work left undone.
- Versatility: Accepts 1/8" or 1/4" collets.
Product Application and Uses:
Final Cleaning And Polishing Of Dies, Mold Finishing, Intricate Grinding Applications, Light Deburring And Flash Removal
- Includes: (1) Tool; (1) Wrench; (1) Hose Assy
- Actuation/Throttle Type/Switch Type: Slide/Zoom
- Air Consumption @ Load (cfm): 6
- Air Consumption @ Load (l/min): 170
- Air Inlet: 1/4" NPT
- Air Pressure (psi): 90
- Arbor/Collet: 1/4"
- Arbor/Collet: 1/8"
- Average Air Consumption (cfm): 6
- Average Air Consumption (l/min): 2.8
- Bearing Type: Ball Bearing
- Configuration/Handle Type: Straight
- Duty Rating: Heavy Duty
- Exhaust Location: Front
- Grinder Type: Pencil Grinder
- Gripping Length (in): 3.2
- Housing Material: Steel
- Max Free Speed (rpm): 60000
- Max Pressure (bar): 6.2
- Min Hose Size (in): 1/4
- Pencil Diameter (in): 0.67
- Power Source: Air Powered
- Product Length (in): 5.6
- Product Width (in): 6.4
- Product Height (in): 2.3
- Product Weight (lb): 2.6
- Rated Power (hp): 0.1
- Side to Center Distance (in): 0.35
- Side to Center Distance (mm): 9
- Sound Pressure/Power Db(A): 76.0 / Na
- Speed Setting: Variable Speed
- Spindle Offset (in): 0.4
- Standards/Certifications: 2006/42/Ec, En Iso 28927-12, En Iso 15744
- Vibration Level (m/s2): < 2.5
- Warranty: 1-year
- Wheel Diameter (in): 0.25
- Wheel Type: Burr
- Whip Hose (in): 3/16
- Lubrication: 10G
- Lubrication: 10P
Die Grinder, 1/4In. Collet, 25,000 rpm
DC 10L1082-36
GRINDER,RE,25K,1/4" COLLET- Durable aluminum housing - Ideal for die/mold and deburring work
- Compact size for ultimate control - easy access to confined areas
- Rear exhaust models are " OH" Overhose Ready for additional noise suppression
- Comprehensive selection of speed available
- LH = Left Hand Rotation Version
Exhaust: Rear
Tool Configuration: Inline
Type Housing: Aluminum
Weight (lbs): 0.66 lb
All tools performance rated @ 90 psi / 620 kPa air pressure. Standard Equipment: Applicable collet, collet wrenches Minimum Hose I.D.: 1/4 in / 6.4 mm
Grinder Ergo FE, 23K, 1/4in Collet
DC 12L2500-36
GRINDR ERGO,FE,23K,1/4" COLLET- Ergonomic composite housing
- Optional over-hose available
- High power-to-weight ratio for optimal productivity
- OH models include 4' Overhose for additional noise suppression
- Conversion kits available to add OH Overhose on rear exhaust tools for additional noise suppression
Exhaust: Front
Tool Configuration: Inline
Type Housing: Composite
Weight (lbs): 1.76 lb
All tools performance rated @ 90 psi / 620 kPa air pressure. Standard Equipment: Applicable collet, collet wrenches Minimum Hose I.D.: 5/16 in / 7.9 mm Termination -01 = 200 Series collet Termination -36 = 300 series collet
G1 ANGLE GRINDER, 3" TYPE 1 WHEEL
IR G1H200RH63
Air Grinder, 3" Type 1 Wheel, 20,000 RPM, 0.4 HP, 3/8"-24 Thread, Rear Exhaust
The G1 Series Type 1 Grinders come equipped with powerful 0.4HP vane motors and adjustable front, rear and dual exhaust options. A motor controller helps maintain tool speed to maximize removal rate and increase operator safety by preventing overspeeding.Features And Benefits
- Power: At 0.4 HP and 20,000 RPM, the G1 Series packs a lot of power in a small package.
- Comfort: At home, in industrial, heavy machinery, construction environments and more, this lightweight tool features an ergonomic design and low vibrations that make even the toughest jobs a little bit easier.
- Reduced Vibration: Patent-pending soft-mount system reduces vibration for extended motor and switch life.
- Optimized for general industrial use, MRO, rail, heavy machinery, oil and gas, shipbuilding, construction, aerospace, and metal fabrication.
Product Application and Uses: Ideal for light material removal, cleaning rough castings, deburring parts, cleaning up welds, and other finishing tasks.
Actuation/Throttle Type/Switch Type: Safety Lever
Air Inlet: 1/4" NPT
Air Pressure (psi): 90
Arbor/Collet: 3/8"-24 Thread
Color: Black
Configuration/Handle Type: Straight
Exhaust Location: Rear
Grinder Type: Horizontal Grinder
Guard Material: Steel
Handle Material: Composite
Lock Mechanism: Lever lock in off position
Max Free Speed (rpm): 20000
Max Pressure (bar): 6.2
Min Hose Size (in): 5/16
Power Source: Air Powered
Rated Power (hp): 0.4
Sound Pressure/Power Db(A): 83.0 / 94.0
Vibration Level (m/s2): 10.7
Vibration Uncertainy K* (m/s2): 3.3
Warranty: 1-year
Wheel Diameter (in): 3
Wheel Thickness (in): 1/4
Wheel Type: Type 1