The Draper 5 Piece Countersinking Drill Bit Set is a professional drill accessory designed for creating perfectly flush screw holes in wood and plastics. This versatile set pilot drills and countersinks simultaneously, delivering faster results and a cleaner finish compared to traditional two-step methods. Manufactured from durable carbon steel C45 with high-speed steel replaceable drill bits, this heavy-duty set is built for regular professional use. The adjustable drill bits fasten securely with a hex set screw, allowing precise depth control for consistent countersinking across different materials. The quick change 6.35mm hex shank fits standard drills with 10/13mm chucks, enabling rapid bit changes on site. Ideal for carpenters, joiners and furniture makers working with hardwood, softwood and plastics, this set covers the most common screw sizes. The five-piece kit includes countersink bits sized for #4, #6, #8, #10 and #12 screws, providing comprehensive coverage for joinery, cabinetry, decking and general woodworking applications where professional flush-fitting screw installations are required. Features and Benefits: • Pilot drills and countersinks at the same time, producing a faster finish • Heavy-duty design manufactured from carbon steel C45 • Replaceable drill bits manufactured from high-speed steel • Drill bits can be adjusted and fastened with a hex set screw • For countersinking screw holes for flush fitting of screwheads in hardwood, softwood and plastics • Fitted with quick change 6.35mm hex shank • Compatible with drills with a standard 10/13mm chuck Specifications: Tip angle: 118° Flutes: Single Material: HSS and carbon steel C45 Connection: 6.35mm hex shank Contents: 5 x Countersink bits - #4, #6, #8, #10, #12