Amana Tool (46100) SC Spiral Plunge 1/8 D x 1/2 CH x 1/4 SHK x 2 Inch Long 2 Flute Up-Cut Router Bit

Spiral 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. 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 for mortising.