Forstner bits are used for drilling in woodworking in preference to drill bits and flat bits when a clean and precise hole is required. Bore very precise flat bottom holes in wood. Manufactured from heat treated steel for strength and durability. Can cut on the edge to a block of wood and can also cut overlapping holes. The bits have a centre point which gives a centre point start and guides it during the cut, allowing for accurate results each time. All of the drill bits have 3/8 shanks that fit almost most lathes / presses and drills (whether cordless / electric or air). Allows holes to be drilled without passing through the material when a clean and precise bottom to a hole is required. Metric And Imperial sizes. SET Includes; SIZES 6mm (1/4), 10mm (3/8), 13mm (1/2), 16mm (5/8), 19mm (3/4), 22mm (7/8), 25mm (1), 29mm (11/8), 32mm (11/4), 35mm (13/8), 38mm (11/2), 41mm (15/8), 44mm (13/4), 48mm (17/8), 51mm (2) and 54mm (21/8) Comes in a wooden case for easy storage and transportation.