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Step Drill Bits
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Search:
Unibit Cobalt Step Drill
Irwin Tools
(click image to enlarge)
SKU / Product Info
Quantity
10220CB
#20, Hole Size: 9/16" - 1", Hole #: 8 steps, 1/16" Hole Enlarging
10231CB
#1, Hole Size: 1/8" - 1/2", Hole #: 13 steps, 1/32" Increments
10232CB
#2, Hole Size: 3/16" - 1/2", Hole #: 6 steps, 1/16" Increments
10233CB
#3, Hole Size: 1/4" - 3/4, Hole #: "9 steps, 1/16" Increments
10234CB
#4, Hole Size: 3/16" - 7/8", Hole #: 12 steps, 1/16" Increments
10239CB
#9, Hole Size: 7/8" and 1-1/8", Hole #: 2 steps, for 1/2" and 3/4 KO
11101CB
#1M, Hole Size: 4mm - 12mm, Hole #: 9 steps, 1mm Increments
11102CB
#2M, Hole Size: 4mm - 12mm, Hole #: 5 steps, 2mm Increments
11103CB
#3M, Hole Size: 6mm - 18mm, Hole #: 7 steps, 2mm Increments
11104CB
#4M, Hole Size: 4mm - 22mm, Hole #: 10 steps, 2mm Increments
Quick Overview
6X Longer life vs. the competition
M35 grade Cobalt HSS
Radial concave flute
Speedpoint™ tip
Laser marked sizes
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Additional Information
Manufacturer: Irwin Tools
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