【Professional Woodworking Tool Set】The Preciva Countersink Drill Bit Set includes essential woodworking tools. It comes with 5 pcs of high-speed steel (HSS) tapered drill bits, 2 pcs of low friction depth stops, 1 pcs universal screwdriver and 1 pcs allen key, all contained in a convenient storage box for easy organization. 【Depth Adjustable Design】This countersink drill bit offers adjustable pilot drill and counterbore depths, allowing for precise drilling in your woodworking projects. Simply use the included wrench to adjust the depth stop and drill bit, ensuring you achieve accurate results every time. 【Sharp & Sturdy Construction】Each countersink drill bit is crafted from M2 HSS, featuring spiral chip flutes for rapid cutting. The sharp steel alloy cutting edges create smooth countersink and counterbore holes, making it ideal for screws fitting 82-degree imperial standards, providing a firm grip compatible with most rigs. 【Widely Used for Various Materials】This countersink drill bit set is perfect for working with natural woods, chipboard, plywood, MDF, drywall, and various plastic boards. For optimal performance and clean edges, operate the countersink drill bits at slow speeds of approximately 200 RPM. 【Compact and Convenient Storage】With a lightweight design of only 11.9 ounces (340g), this woodworking tools and accessories set is easy to carry anywhere. The included hanging hole allows for free-hanging storage, ensuring your countersink drill bits are always within reach when you need them. The countersink drill bit set that covers all the tool accessories you need for entire wood project. Our crafted from industrial-grade high-speed steel with a nitrided surface, our woodworking countersink drill bit offer enhanced toughness and wear resistance.  This counter sink drill bit for wood offers precise control over pilot hole depth, ensuring consistent and accurate countersinking for a truly professional finish. Our drill bit's sharp cutters and 82-degree counterbore angle ensure smooth, rapid drilling in hard and soft woods.  This counter sinker drill bit set are suitable for hand drills, bench drills, electric drills.  Note: For optimal cutting results, it is recommended to use the wood plug cutter on a bench drill.