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Made by high speed steel with heat treatment. |
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Drill round holes in most metals,plastic,wood, and etc. |
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Self-starting tips will not skid. No need for center punching or pilot drill. For using electric drills and drill presses. |
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The titanium-Nitride Coated one increases the hardness and makes the bit last up to 4-5 times longer than ordinary drill bits. |
| H.S.S. Stock No |
Tin Coated Stock No. |
Hole Size |
No. of Holes |
Increments |
Shank Size |
| 21-ST1 |
21-ST1T |
1/8" - 1/2" |
13 |
1/32" |
1/4" |
| 21-ST2 |
21-ST2T |
3/16" - 1/2" |
6 |
1/16" |
1/4" |
| 21-ST3 |
21-ST3T |
1/4" - 3/4" |
9 |
1/16" |
3/8" |
| 21-ST4 |
21-ST4T |
3/16" - 7/8" |
12 |
1/16" |
3/8" |
| 21-ST5 |
21-ST5T |
1/4" - 1 3/8" |
10 |
1/8" |
1/2" |
| 21-ST9 |
21-ST9T |
7/8" - 1 1/8" |
2 |
- |
1/2" |
| 21-ST123 |
21-ST123T |
1/8" - 3/4" |
3-Pc Set |
1/32", 1/16" |
1/4", 3/8" |
| 21-ST50 |
21-ST50 |
1/8" - 1 3/8" |
6, 9, 10, 12, 13 |
1/16", 1/8", 1/32" |
1/4", 3/8" |
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