Amana Tool 46253 CNC Solid Carbide Spiral Plunge for Solid Wood 5/16 D x 1-1/8 CH x 1/2 SHK x 3 Inch Long Up-Cut Router Bit

Solid Carbide Spiral Flute Plunge Router Bits for Solid Wood
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.