CMT 537.000.07  7-Piece Forstner Bit set, 1/4-3/8-1/2-5/8-3/4-7/8-1 Diameters, 3/8-Inch Shank Made of super strength alloyed steel (SP). Delivered in practical clamsheel packaging. Ideal for drill presses, electric and cordless drills. For clean sharp holes with straight sides and flat bottoms in all types of soft wood. Bits feature right-hand rotation.