Professional tool for commercial or occasional use Suitable for everyday use by plant, recovery and other companies working on heavy equipment etc. This is a very powerful gun. Total torque of up to 1600ft/lbs (2200 n/m) in order to obtain maximum torque the hose needs to have a minimum of 13mm internal diameter. Long 8″ anvil which allows access into recessed wheels etc… Free speed of 3900 rpm Air inlet 1/2″ BSP Twin handles for maximum grip when using this application Three speed for accurate work Forward and reverse lever Lever throttle control. 1″ square drive so will fit any 1″ impact sockets / extensions etc…