Product DescriptionDescription:100% brand new and high quality.Special Reminding: These flute countersink drill bit set are machined from high speed steels and are available in 6 different diameter sizes. Size - 6mm(1/4''), 8mm(5/16''), 9mm(3/8''), 12mm(1/2''), 16mm(5/8''), 19mm(3/4'').Eliminates Chatter & Vibration: All have a 82°/90° angle (option) on the point for sharp and precise countersinking. The cutting edge is hardened and honed for sharpness. A Chatter-Free, five-flute designed with staggered cutting teeth arranged to insure free chip flow and rapid chatter free cutting.Widely Application: Ideal for wooden planks, fiberboard, particle board, plywood, plastic, aluminum board, PCB board and more.Premium Design: Great for Sinking Holes into Wood and Soft Metals Countersunk Screws and Fixings. Suitable for DIY, Home and General Building/Engineering Using. ●NOTE: There will be a slight color difference between the picture and the actual product. Sweet Tips: 1/4″ hex shank countersinks are fine for a quick drill. They don’t slip in drill chucks. You can make deep countersinks easily by setting the countersink’s depth stop to allow the countersink to drill more deeply into the work surface. Be sure to measure the size of your plug to be sure your countersink’s body will make the right-size hole.Specification:Material: High Speed SteelsFinish: Titanium CoatedNumber of Flute: 5-FluteSize: 6mm(1/4''), 8mm(5/16''), 9mm(3/8''), 12mm(1/2''), 16mm(5/8''), 19mm(3/4'')Quantity: 1 Set (6 Drills)Length: 48mm / 1.88''Shank Type: HexSplit Point Angle: 82° / 90°Package Included:1PCS X 6mm Countersink Bit1PCS X 8mm Countersink Bit1PCS X 9mm Countersink Bit1PCS X 12mm Countersink Bit1PCS X 16mm Countersink Bit1PCS X 19mm Countersink Bit