* Full metal gearbox * Compact 155mm length * 4-pole motor * 1/2" square drive * LED light Compact 1/2" impact wrench measures 155 mm in length making it ideal for working within confined spaces. High performance 4-pole motor delivers maximum power whilst maximising the power to weight ratio. REDLINK™ overload protection electronics in tool and battery pack deliver best in class system durability. Heavy duty full metal gearbox and gears for superior durability and maximum torque. 1/2" square drive for use with universal sockets. Individual battery cell monitoring optimises tool run time and ensures long term pack durability. On board fuel gauge and LED light. REDLITHIUM™ battery pack provides superior pack construction, electronics and fade-free performance to deliver more run time and more work over pack life. Flexible battery system: works with all MILWAUKEE® M18™ batteries. Milwaukee M18 BIW12-0 Compact 1/2" Impact Wrench Body Only