Step Drill Bit, Material: Cobalt Alloy Steel, Vapor Oxide Finish, Number of Hole Sizes 8, Shank Size 7/16 in, Pitch Thickness 1/8 in, Size Range 9/16 in. to 2.5 cm, sizes included 9/16 in, 5/8 in, 11/16 in, 3/4 in, 13/16 in, 7/8 in, 15/16 in, 2.5 cm, number of 1 SPLINEs, hex shank type, bit length 3". Irwin 10220CB Foret étagé à 8 étages en alliage de cobalt avec trou de 0,6 cm