Featuring M2 HSS tapered pilot drill bits in sizes 1/8inch, 9/64inch, 5/32inch for #10, #12, #14 screws, this set includes 82 countersink 3/8inch counter-bore sleeves and a 1/4inch hex shank ensuring a secure grip and universal compatibility with most drills. Equipped with tungsten steel alloy cutting edges, our countersink and counterbore bits deliver smooth, burr-free cuts. Ideal for sheet metal and machine screws, these bits adhere to U.S. standards for 82-degree angles, enhancing your drilling precision. Adjust both drill and counterbore depths with ease using hex threaded screws and a depth control stop. This feature offers unparalleled versatility for applications, and the M2 HSS pilot drill bits are replaceable with standard size bits for extended usability. Optimized for cutting through natural woods, man-made boards, MDF, chipboard, plywood, aluminum, non-ferrous materials, decking materials, and high-density polyethylene (HDPE), this set is a versatile addition to any workshop. This comprehensive set includes an additional stop collar to minimize marking on materials, a wrench for adjustments, ensuring both enhanced performance and convenience for continuous use in any workshop environment. Colour:Photo Color Material:Metal The actual product may have slight color difference or difference, which will not affect the use Package Contents: 1 x Limit Countersinking Drill 2 x 4-Flute Drill Bits (with center drill) 1 x Hexagonal Wrench 1 x Plastic Ring Only the above package content, other products are not included. Note: Light reflection 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.