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IRWIN UNIBIT Step Drills 10231

10234

  • High speed steel fractional
  • Single-fluted cutting edge for greater control and rounder holes
  • Ideal for drilling holes in thin materials such as mild steel, copper, brass, aluminum, plexiglass, wood and laminates
  • 3-flatted shank won’t slip in chuck
  • Speedpoint tip for fast starting
  • Laser marked sizes won’t wear off with use
Style
No.
Number
of Holes
Hole
Sizes
Increments
Shank
Size
Max
Material
Thickness
Part No.
1
13
1/8" - 1/2"
1/32"
1/4"
1/8"
10231
2
6
3/16" - 1/2"
1/16"
1/4"
3/8"
10232
3
9
1/4" - 3/4"
1/16"
3/8"
1/8"
10233
4
12
3/16" - 7/8"
1/16"
3/8"
1/8"
10234
5
10
1/4" - 1-3/8"
1/8"
1/2"
1/8"
10235
#9
2 Steps
7/8" and 1-1/8"
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--
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10239
10
1
1/2"
--
1/4"
--
10310
12
3/8"
--
--
--
--
10312
13
1-1/8"
--
--
--
--
10313
14
1-7/32"
--
--
--
--
10314
20
8
9/16" - 1"
1/16"
1/2"
1/8"
10220

  • Contact Heavy Maintenance Supply 205-384-5284 for more information