The M12™ cordless lithium-ion 1/4 in hex impact driver features a Milwaukee® 4-pole motor and proprietary impact mechanism to provide 850 in-lb of torque and more impacts per minute for maximum productivity and runtime weighing just 2.3 lb, it's tool belt portable and small enough to fit in tight spaces. The M12 Redlithium™ battery pack delivers more work per charge and more work over pack life than the competitors, as well as best-in-class performance in extreme jobsite conditions the variable speed trigger provides increased user control. The M12 1/4 in hex impact driver's lightweight compact design minimizes user fatigue. An on-board, real-time battery fuel gauge helps you monitor the charge precisely, so there's less downtime on the job. Use the built-in led light to illuminate work surfaces in dark locations.