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HSS Step Drill Bit Sets
Features:
- Made of high quality high speed steel
- Producing round, smooth holes in a wide variety of material
- Enlarging holes in sheet metals without center punch or pilot bits
- Using bench drill or light drilling machines
- Available flute shape: straight flute, sprial flute, double spiral flute
- Available surface treatment: White; Titanium Coating; TiALN Coating
- Available shank type: round shank, three flatted shank, hex shank
- Specifications can be customized
- Strong carrying box with easy identifying
Item | Description |
3pc set | 4 - 12mm x 9 steps; 4 - 20mm x 9 steps; 4 - 30mm x 14 steps |
3pc set | 4 - 12mm x 5 steps; 4 - 20mm x 9 steps; 4 - 32mm x 15 steps |
3pc set | 4 - 12mm x 9 steps; 6 - 20mm x 8 steps; 6 - 30mm x 13 steps |
4pc set | 3 - 12mm x 5 steps; 4 - 12mm x 9 steps 4 - 20mm x 9 steps; 4 - 32mm x 15 steps |
3pc set | 3/16" - 1/2" x 6 steps; 1/8" - 1/2" x 13 steps; 1/4" - 3/4" x 9 steps |
5pc set | 3/16" - 1/2" x 6 steps; 1/8" - 1/2" x 13 steps; 1/4" - 3/4" x 9 steps; 3/16" - 7/8" x 12 steps; 1/4" - 1 3/8" x 10 steps |