Dimar TDC-50332 #6 Carbide-Tipped Tapered Countersink Drill Bit by Dimar $29.95 SKU DIMAR TDC-50332 1 2 3 4 5 6 7 8 9 10+ Quantity Quantity Add to cart 1/4- Inch Hex Shank Design for Quick Release For #6 Wood Screw Size Cutting Dia: 3/32" - tapered, Countersink Dia: 3/8" Premium Carbide Tips - Professional Quality