Hand Tapping Tool - Free Speed 250 Rpm - 27 Cfm @ Full Load - Required Pressure 90 Psi - Max Pressure 120 Psi - Min Hose Size 3/8 In - Max Tap Capacity Steel 1/2 In - Max Tap Capacity Aluminum 5/8 In - Tooling Size 1 - Tool Weight 3.3 Lb - Includes Quick Change Tooling Adaptor