"The Lumberjack Tools Pro Series 3-pc. Master Kit enables you to build your own log furniture, achieving old world craftsmanship with today's most advanced log cutting technology Lumberjack tools will help achieve precise results while saving time and money. Dual blade tenon cutters deliver the highest level of performance and technology. U.S.A. Forstner Bit Size in. 1, 1 1/2, 2, Cutter Size in. 1, 1 1/2, 2. Pro Series kit features tenon cutters that produce a radius shoulder Self-centering design produces perfectly shaped tenons Lightweight solid machined aircraft aluminum body Hardened steel blades Dual blades cut twice as fast and generate less heat In-Sight system lets user see and measure tenon length during cutting 1/2in. steel shank chucks into drill for use Includes 1in., 1 1/2in. and 2in. tenon cutters, 1in., 1 1/2in. and 2in. forstner bits, and Quick Stop system"