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No pilot holes required!
Flat drill bit that can dig 45 chamfered round molds
As with conventional spin molds, no pilot holes are required with a drill bit.
And you can easily create chamfered round molds with 45 sides in one go.

Set of 5: 1.0, 1.5, 2.0, 2.5, 3.0 mm
Can dig 45 chamfered round molds without pilot holes
Unlike spin blades, cannot be used as carving knives
The shaft thickness is unified to 3 mm, so there is no need to replace the collet chuck of the pin vice when replacing the blade
Comes with a case for easy storage and carrying