Amana - A46335 7/16" Cut Diameter 2 Flute Spiral Plunge Router BitSpiral flute bits combine a shearing action in cutting with an augering action in chip clearance. The shearing action yields an especially clean accurate cut while the augering action clears chips from the cut. Cut Diameter: 7 16" Shank: 1 2" Cut Length: 1" Overall Length: 3" Flute Type: Spiral Plunge The Up Cut shears from the bottom up pulling chips from the bottom up thus allowing deeper penetration with less stress on the tool. An excellent choice