Like many other wood boring bits, spoon bits use a sharp, chisel-like edge to shave a hole into a wooden workpiece.
As the bit turns, the shavings created by the cutting edge are pushed into the hollow of the bit. As more shavings are pushed into this spoon-shaped recess, waste material is pushed out of the bore hole through the upper part of the spoon.
The curved shape of a spoon bit’s tip means it leaves round-bottomed bore holes. This allows you to drill very close to the reverse side of the workpiece without breaking through – the sloped sides at the bottom of the hole support the weaker centre.
