Snappy Tools 13/64 Inch Tapered Drill Countersink for # 10 Screw (Replaces Part # 44013) #44010 Drill a pilot hole and countersink or counterbore for tapered screws or use to drill a clearance hole for straight screws. New design, now featuring a reusable hex shank for use with round shank tapered twist drills. Features Drive Shank: 1/4 Inch Hex Power Bit Shank Drill Size: 13/64 Inch HSS Tapered Twist Drill Counterbore Size: 3/8 Inch x 82 degree angle Recommended Screw Size: #10 (Tapered Screw) USA SHIPPING estimates delivery times and we work to get your item to you as quickly as possible and within those times, but please know it may take slightly longer than the estimate.