Included cutting diameters: 1/4", 3/8", 1/2", 5/8", 3/4", 7/8", 1", 1-1/8", 1-1/4", 1-3/8", 1-1/2", 1-5/8", 1-3/4", 1-7/8", 2" and 2-1/8". Drill clean and accurate holes in solid wood, plywood and MDF Constructed from high-speed-steel for quality and longevity The 3/8" shank is compatible with all standard drill and drill press chucks Hardened steel constructions for increased rigidity, Weight: 4.4753839186 Pounds, Manufacturer: Yonico