Xdovet 3 Pcs Countersink Drill Bit Set, Hss M2 Countersink Pilot Drill, Low Low Friction No Wear: Our countersink drill bit is equipped with low-friction depth stops, which make it easy to set the drilling depth by adjusting the pilot drill and the countersink. The depth stop prevents shaking of the drilling work, reduces surface wear and ensures complete standardization of the countersinking Standard Dimension: Countersink drill bit set includes 3 replaceable HSS M2 tapered bits for a variety of drilling situations in sizes 1/8", 9/64", 5/32" drills+ 3/8? counter-bore for use in any woodworking project and is a perfect fit for (U.S.) standard 82" screws! Tungsten Steel Material: 3-Piece countersink drill bits are made of tungsten steel alloy for durability. Sharp cutting edges and high drilling efficiency make it easy to drill smooth, burr-free countersinks High Efficiency and Space Saving: Hexagonal shank allows for quick removal of screws and reassembly of countersinking drill kits, simplifying operations and increasing work efficiency. The box is compact and space-saving, making it easy to keep in your pocket and use at any time Wide Application: Assembled in bench drills, electric drills and other equipment for natural wood, particle board, plywood, MDF, non-ferrous metals and decorative panels