The Milwaukee M12 FIW38 FUEL™ Impact Wrench has a 3/8in anvil with friction ring for quick and easy socket changes. With 4-Mode DRIVE CONTROL™, which offers the user precise control. Mode 4 Auto-Shut Off prevents over tightening of fasteners. It has a compact design that provides better access in tight spaces, with an overall length of only 121.9mm. Fitted with a bright, LED work light. Milwaukee® designed and built brushless POWERSTATE™ motor delivers more power in a more compact size. REDLINK PLUS™ intelligence system delivers an advanced digital overload protection for tool and battery and uniquely enhances the tool performance under load. M12 FIW38-622X: 1 x 12V 2.0Ah Li-ion & 1 x 12V 6.0Ah Li-ion BatteriesM12 FIW38-0: Bare Unit, No Battery or Charger Specification: Bit Holder: 3/8in Anvil with Friction RingNo Load Speed: 0-1,200/0-1,800/0-2,700/min.Impact Rate: 0-1,100/0-2,100/0-3,200/bpmMax. Nut Busting Torque: 339NmOverall Length: 121.9mmWeight: 1.1kg (with battery)1 x Milwaukee M12 FIW38-0 FUEL™ 3/8in Impact Wrench is supplied as a bare unit, no battery or charger supplied.