JSM-501 Model Code: AC (part# JSM-501) This item features: -Lightweight yet powerful and compact design. -Heavy duty ball bearing construction for vibration free performance. -Durable precision machined hardened steel gears. -Front exhaust. -Collet Size: 1/4 in. -Power Cap.: 1/4 hp [Max]. -Pressure: 90.00 psi. -Inlet Size: 1/4 in (NPT). -Hose Size: 3/8 in. -Handle Type: Body Grip. -Applications: Grinding. -Price is for 1 Each. Model Code Model Description AAFree Speed:20000 rpm, Air Consumption:12 CFM [Max], Vibration:1 m/s2, Length:5 in, Control Type:Variable Speed Throttle, Lock-Off Lever, Type:Angle Die Grinder, Wt.:1 1/4 lb ABFree Speed:22000 rpm, Air Consumption:4 CFM [Max], Vibration:2.2 m/s2, Length:6 1/4 in, Control Type:Variable Speed Throttle, Self-Closing Lever, Type:Angle Die Grinder, Wt.:1 lb ACFree Speed:22000 rpm, Air Consumption:4 CFM [Max], Vibration:3 m/s2, Length:7 in, Control Type:Variable Speed Throttle, Lock-Off Lever, Type:Straight Die Grinder, Wt.:1 1/4 lb ADFree Speed:22000 rpm, Air Consumption:4 CFM [Max], Vibration:5.4 m/s2, Length:6 3/4 in, Control Type:Variable Speed Throttle, Self-Closing Lever, Type:Straight Die Grinder, Wt.:1 1/8 lb AEFree Speed:25000 rpm, Air Consumption:4 CFM [Max], Vibration:0.9 m/s2, Length:6 in, Control Type:Variable Speed Throttle, Self-Closing Lever, Type:Straight Die Grinder, Wt.:1 lb