Cobalt Step Drill Bit(6 Products)
IRWIN INDUSTRIAL TOOLS

Number Of Hole Sizes Drill Bit Sizes Included Decimal Equivalent Shank Hex Size Minimum Hole Size Bit Length Shank Size Step Increments Price
2 7/8", 1-1/8" 0.875, 1.125 - 7/8" 3 1/8" 7/16" 1/4" £221.29
6 3/16", 1/4", 5/16", 3/8", 7/16", 1/2" 0.1875, 0.25, 0.3125, 0.375, 0.4375, 0.5 1/4" 3/16" 3 1/8" 1/4" 1/16" £77.12
8 9/16", 5/8", 11/16", 3/4", 13/16", 7/8", 15/16", 1" 0.5625, 0.625, 0.6875, 0.75, 0.8125, 0.875, 0.9375, 1 - 9/16" 3" 7/16" 1/16" £153.09
9 1/4", 5/16", 3/8", 7/16", 1/2", 9/16", 5/8", 11/16", 3/4" 0.25, 0.3125, 0.375, 0.4375, 0.5, 0.5625, 0.625, 0.6875, 0.75 3/8" 1/4" 2 3/4" 3/8" 1/16" £136.82
12 3/16", 1/4", 5/16", 3/8", 7/16", 1/2", 9/16", 5/8", 11/16", 3/4", 13/16", 7/8" 0.1875, 0.25, 0.3125, 0.375, 0.4375, 0.5, 0.5625, 0.625, 0.6875, 0.75, 0.8125, 0.875 - 3/16" 3 1/4" 3/8" 1/16" £153.95
13 1/8", 5/32", 3/16", 7/32", 1/4", 9/32", 5/16", 11/32", 3/8", 13/32", 7/16", 15/32", 1/2" 0.125, 0.1563, 0.1875, 0.2188, 0.25, 0.2813, 0.3125, 0.3438, 0.375, 0.4063, 0.4375, 0.4688, 0.5 1/4" 1/8" 3 1/8" 1/4" 1/32" £79.68