Helical-cut steel, heat-treated steel gears for long life and durability, High power motor for metal fastening applications, Versa-Clutch torque adjustment system "dials in" the proper torque needed to efficiently drive fasteners without stripping or breaking fastener, Rubber grip and two-finger trigger for increased comfort and greater control, Metal nose and gear case for durability on the job, Excellent ergonomics offers less user fatigue.