ZM-2800A / ZM-2800B Square Drive: 3/8" & 1/2" Rated No Load Speed: 9000 r.p.m Maximum Torque: 520 N-m Capacity Bolt Dia.: 13mm Air Pressure: 6-8 kg Air Inlet: 1/4" Anvil Length: 3/4" & 1" Net Weight: 1.6 kg