DINGQI wood spiral drill bit set, five diameters, 200 mm length, hex shank that does not slip in the chuck. The spiral pulls out the chips, so the bit does not jam even in deep holes through beams.
Questions and answers
How is a spiral drill bit different from a regular one?
The screw tip pulls the bit into the wood by itself, and the deep spiral ejects the chips, for faster drilling of deep holes with less pressure.
Do they fit a regular drill?
Yes, the hex shank fits every 13 mm chuck and quick-change adapters.
Which materials are they intended for?
For soft and hard wood, beams and panels. They are not for metal or concrete.
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