Pricing mentioned is for EA. Requires a minimum buy of 1 piece. Collet Size=1/4 in; Power Capacity=1/2 hp; Free Speed=22000 rpm, 22000 rpm [Max]; Air Consumption=16 CFM [Max]; Pressure=90 psi; Noise Level=102.0 dB, 102.0 dB [Max]; Vibration=2.5 m/s2, 2.5 m/s2 [Max]; Inlet Size=1/4 in (NPT); Hose Size=3/8 in; Length=6 1/2 in; Housing Material=Aluminum; Control Type=Lock-Off Lever Throttle; Type=Die Grinder;