Featuring 44in lbs of peak torque, a 21 position clutch with auto shut off, and a 2 speed gearbox providing 200 and 600rpm. At only 244mm in length and under 1lb, The M4 screwdriver features 1/4" quick change chuck for 1 hand bit changes. Drilling more than 200 holes per charge. the M4 screwdriver is the first tool to feature Milwaukee's RED LITHIUM 2.0 battery on the new M4 platform, offering up to 50% more runtime. Milwaukee remains committed to offering innovative solutions in power, productivity and portability