Drill pilot hole and tapered Countersink for wood screws. The 2-Flute integral design ensures uniform concentric results each and every time. Carbide Tipped for long lasting results in hardwood, plywood, plastics, etc, #55626, (A°) angle: 49°, (D) diameter: 3/8, (D) shank: 1/4, overall length (L): 2-1/8, wood screw size: 10, D1: 1/8, replacement drill: 630-266, 55626 carbide Tipped 82 degree Countersink taper #10 screw 3/8 dia x 1/8 drill DIA x 1/4 hex shank