5 PCS 12mm Steel Plate High-Speed Steel 4341 Black Yellow Twist Drill

1. Material: high speed steel 4341
2. Double relief angle
3. Super smooth chip flute
4. Tool handle type: straight handle
5. Outer blade tip angle: 118 degrees
6. Useful length: 6mm or more
7. Diameter of handle: 0.5mm or more
8. Chip flute length: 6mm or more
9. Cutting diameter (mm): various
10. Rigorous quenching process, ultra-high toughness
11. Cooling type (internal cooling/external cooling): external cooling
12. Can drill all kinds of steel, iron, aluminum alloy and other metals, bamboo, wood, plastics and other materials
13. Model: diameter 9.0mm: groove length 81mm, total length 125mm; diameter 9.5mm: groove length 81mm, total length 125mm; diameter 10mm: groove length 87mm, total length 133mm; diameter 10.5mm: groove length 87mm, total length 133mm; diameter 11mm: groove length 94mm, total length 142mm; diameter 11.5mm: groove length 94mm, total length 142mm; diameter 12mm: groove length 101mm, total length 151mm; diameter 12.5mm: groove length 101mm, total length 151mm; diameter 13mm: groove length 101mm, total length 151mm; diameter 13.5mm ：Ditch length 108mm, total length 160mm; diameter 14mm: groove length 108mm, total length 160mm; diameter 16mm: groove length 120mm, total length 178mm