The Chicago Pneumatic rock drill features a streamlined design that is ideal for quarry, mine, drilling and doweling work.Chuck Size: 7/8 x 3 1/4 in.Air Consumption: 103 @ 90 PSI CFM.Air Inlet Size: 3/4 in.Tool Weight: 54 lbs.Tool Length: 22 in.Streamlined design is ideal for quarry, mine, drilling and doweling work.Air inlet swivel for improved maneuverability.Main valve design and cylinder-porting concept maintain constant drilling speed and long service life.Working parts are continually protected with effective lubrication system.Retainer design delivers increased contact and reduces collar wear.Cushioned piston reduces shock.Forged steel housing.Double-grip handles.