| Main centres: | 1-3 business days |
| Regional areas: | 3-4 business days |
| Remote areas: | 3-5 business days |
| Type | The corresponding bit size(mm) | Chamfer size(mm) | Length (mm) |
| 5# | 1/8 (3.18mm) | 9.5mm | 77mm |
| 6# | 9/64 (3.58mm) | 9.5mm | 80mm |
| 7# | 5/32 (3.97mm) | 9.5mm | 84mm |
| 8# | 11/64 (4.37mm) | 9.5mm | 85mm |
| 9# | 3/16 (4.76mm) | 9.5mm | 88mm |
| 10# | 13/64 (5.15mm) | 9.5mm | 91mm |
| 12# | 7/32 (5.56mm) | 9.5mm | 95mm |
