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.