IRWIN UNIBIT Step Drills 10231
- 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" | -- | -- | -- | 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
