Lumberjack Tools 3-Piece Commercial Series Master Kit (CSK3) Ergonomically designed, lightweight, safe and easy to use Cuts a 1", 1 1/2" or 2" diameter tenon with a 60 tapered shoulder profile Designed to run on a heavy duty 1/2", single speed, high torque, low rpm (500 or less) corded drill Great for professionals, contractors, craftspeople, those who prefer the tapered shoulder style and those who need a larger log capacity Proudly designed and made in USA