Milwaukee M18 BIW38 Compact 3/8in Impact Wrench measures 152mm in length making it perfect for working in confined spaces. With a heavy-duty full metal gear box and gears for superior durability and maximum torque. With REDLINK™ overload protection electronics in the tool and battery pack, it delivers best in class system durability. Also has an on board fuel gauge and LED light. REDLITHIUM-ION™ batteries deliver two times more run time, up to 20% more power, and two times more battery life. The battery also operates better at -20°C, than any other lithium-ion batteries. Individual cell monitoring optimises tool run time ensuring long term durability. Flexible battery system that works with all Milwaukee M18™ batteries. Specifications: Bit Holder: 3/8in Square. No Load Speed: 0-2,450/min. Impacts Per Min: 0-3,350/min. Max Torque: 210Nm.