Colt Twinland

A recent video showed briefly the Colt Twinland Brad Point drill bit.  These have an interesting feature in the double helix of the design which makes for a much better guidance, either down the hole as it is being drilled, or in a drilling jig.

It has excellent chip clearance, which makes for a cleaner hole, and less heat generation from the cut, making for potentially less damage to the timber, and longer bit life.

Any bit over 10mm diameter has a step-down shaft diameter, so bits up to 19mm can still fit a 10mm chuck.

They are nice to use, and are exceptionally sharp.  Available from Professional Woodworkers Supplies

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