Create square slots, pockets, and edges in wood.

Bits with spiral flutes make plunge cuts more easily than straight-flute bits and leave a smoother finish. They're made from solid carbide for the longest tool life and fastest cutting speeds. Their extreme hardness means they are brittle, so a highly rigid setup, such as a CNC machine, is necessary to prevent the bit from breaking.

Spiral-flute bits with upward and downward chip removal are also known as compression bits. They move chips away from the top and bottom edges of the cut for a smooth finish on both.