[Countersink Drill Bit Set]The set is made of classic high speed steel with a hardness of HRC 62-64, with excellent cutting force, high durability and good wear resistance. Countersink drill pilot holes and countersinks or countersinks in , providing perfectly sized holes for #4, #6, #8, #10, or #12 screws. The screw heads are flush with or slightly below the and are perfect for use with stoppers or dowel buttons. Product Details Countersink is angled at 82 degrees to match the 82 degree screws you use in the workshop. 1/4inch hex shank for drills and quick change chucks. [Plug and Dowel Cutter Bits]Made of carbon steel material for drilling 1/4inch (6mm), 3/8inch (10mm) corks to cover recessed screw holes or damage repairs, As well as a large drill flute screw plug cutter to remove sawdust faster and easier. [Multipurpose Use]This countersink drill set is specially designed for quick adjustable countersink and countersink, the countersink part of this set can be easily replaced. perfect for DIY, home and small woodworking projects, mainly for wood, fiberboard, particleboard, plywood, plastic, PVC, rubber, etc... A well-equipped set of woodworking tools is perfect for professionals or beginners. Colour:black Material:High-carbon steel Package Contents: 1 x Countersink Drill Bit Set Only the above package content, other products are not included. Note: Light and different displays may cause the color of the item in the picture a little different from the real thing. The measurement allowed error is +/- 1-3cm.