Flute bit

a boring tool for piercing ebony, rosewood, and other hard woods.

See also: Flute

References in periodicals archive ?
Lap joints can be made several ways, but building this simple jig and using a top-bearing straight flute bit is the most efficient because we also use the same bit for making the oval blanks.
Set the depth of your top-bearing straight flute bit to make a 3/8-in.