The Milwaukee M12 FIWF12 Impact Wrench has a 1/2in 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 125mm. 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. REDLITHIUM-ION™ battery pack provides superior pack construction, electronics and fade-free performance to deliver more run time and more work over pack life. Individual battery cell monitoring optimises tool run time and ensures long term pack durability. M12 FIWF12-622X: 1 x 12V 2.0Ah Li-ion & 1 x 12V 6.0Ah Li-ion BatteriesM12 FIWF12-0: Bare Unit, No Battery or Charger Specification: Bit Holder: 1/2in 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: 339NmThe Milwaukee M12 FIWF12-0 FUEL™ 1/2in Impact Wrench is supplied as a bare unit, no battery or charger supplied.