Chiloskit Countersink Drill Bit Set - HSS 6pcs 6.3mm 8.3mm 10.4mm 12.4mm 16.5mm 20.5mm

[Wide application]: This counter sink bit Suitable for workpieces with hardness less than 45HRC, such as carbon steel, aluminum plate, carbon steel, thin iron plate, insulating plate, PVC plate, wood board, etc.(Not Great for Stainless Steel）. [Efficiency]: this wood metal drilling bit has a one-piece design, which makes the chips generated during the chamfering process more convenient, and will not delay work efficiency due to tool blockage.. [HSS 4231]: each metal countersunk drill bit is made from high quality HSS material, Chiloskit countersink drill bit set is excellent in heat, corrosion and rust resistance.. [Ease of use]: The automatic through-hole chamfering cutter can quickly trim and chamfer both sides of the hole in a few seconds.including 6 most popular sizes: : 6.3mm(1/4''), 8.3mm(5/16''), 10.4mm(2/5''), 12.4mm(1/2''), 16.5mm(5/8''), 20.5mm(4/5'').Shank: round shank.Not recommended to use hand drills.. Great gift for man DIYer . Don't settle for less - choose our countersink drill bit set for a superior drilling experience.If you are not satisfied withthe functions or any other reasons, just return it to us and we’ll be happy to resolve any problems