The Milwaukee M12 3/8 in. Ratchet delivers the best power, speed and durability for subcompact tools. The cordless ratchet wrench is ideal for auto mechanics, maintenance and repair professionals looking for maximum performance and productivity in a cordless tool. Subcompact. Uses a powerful 12-volt motor to produce up to 35 ft./lbs. of torque and 250 RPM, giving users the power and speed of an air ratchet without the air hose.