| Type | Diameter | Length |
| 6# | Dia 3mm (0.118 inch) | 70mm(27.55 inch) |
| 10# | Dia 3.5mm (0.138 inch) | 75mm(29.52 inch) |
| 13# | Dia 4mm (0.157 inch) | 90mm(35.43 inch) |
| 16# | Dia 4.5mm (0.177 inch) | 94mm(37.00 inch) |
| Black chamfer drill body material | Carbon steel | |
| Shank | Dia 2.5mm (0.984 inch) | |
4 Pcs set includes bits for drilling pilot holes for screw sizes #6，#10，#13 ，#16.
Function: can drill the screw holes and keep on the same axis.
Apply to with a clamp or joint drilling machine， suitable for drilling in the hard wood and wood floor， machine screw for wood screw.
Package Included:
4 x Drill Bits
1 x Hex Shank
