Forstner 16-piece bit set by Hilka contains hardened and tempered high-quality alloy steel bits. Precision machined cutting tips for a fast and effortless cut. The bit set is designed to make professional and clean flat holes in wood. In blow mould case for safe storage. Sizes: 1/4" (6mm), 3/8" (10mm), 1/2" (13mm), 5/8" (16mm), 3/4" (19mm), 7/8" (22mm), 1" (25mm), 1 1/8" (28mm), 1 1/4 (32mm), 1 3/8" (35mm), 1 1/2" (38mm), 1 5/8" (41mm), 1 3/4" (44mm), 1 7/8" (48mm), 2" (51mm), 2 1/8" (54mm). Also, a 6-10mm shank is supplied in a plastic carrying case.