Freud 75-102 Router Bit, 1/4 in Dia Shank, Carbide | Up spiral bits combine effective chip removal with a cut that can't be matched by standard straight bits. Computer designed flutes provide the chip removal required in production settings. Suited for cutting mortices or routing deep blind holes. Excellent for grooves and dados in all composition materials, plywood, hard wood and soft wood. Use on CNC and other automatic routers as well as hand held and table mounted portable routers.