**Specifications**Model MT188Impact Mechanism Jumbo Twin HammerSquare Drive 1/2" (13mm)Bolt Size Capability 5/8" (16mm)Free Speed 10000rpmWorking Torque (550Nm)Avg. Air Consumption 5CFM (142L/min)Working Pressure 90psi (6.3BAR)Air Hose Size 3/8" IDAir Inlet Thread 1/4" NPT (6.35mm)Overall Length 112mm (4.4")Weight 1.8kgsSuggested Air Compressor 3.0HP