1/2" Diameter x 5/16" Carbide Height Mortising Router Bit, 1/4" Shank, Down Shear Works To Eliminate Splintering, Deep Center Gullets For Maximum Material Removal Without Chip Loading, Cuts All Composition Materials, Plywoods, Hardwoods & Softwoods, Use On CNC & Other Automatic Routers, Hand Held & Table Mounted Portable Routers.