【Five-blade design】Introducing the Countersink Drill Bit Set for Metal - the perfect set for anyone looking to add a professional touch to their drilling projects.Whether you're working with copper, aluminum, or wood, these M2 cobalt countersunk bits are the tools you need for countersinking effortlessly. 【Compact Grinding】With countersunk bits at an 82-degree angle and 5 flute design, this 5-piece set ensures clean and precise cuts with every drilling job.The set includes 1/4 inch hex shank drill bit, making it easy for you to swap out bits on your power drill. 【M2 Cobalt Layered Drill Bits】M2 Cobalt Coated, each metal countersunk drill bit is made of high quality M2 material, this countersunk drill bit set is excellent in heat, corrosion and rust resistance to reduce friction and run cooler.This set is perfect for people looking into counter sink metal to give it a professional look. The countersink bits are made to last and can easily drill through tough materials.The specially crafted countersinkers provide you with the ideal countersink bit metal experience. 【Universal Compatibility】Surface black oxide treatment increases corrosion resistance, and the five-blade design helps create a strong connection between the screw and the material. 【Clear Sizes】Meticulously crafted drills with very high visibility numbers available in very common 1/4", 3/8", 1/2", 5/8" and 3/4" drill sizes. If you're looking to achieve a sleek and professional finish to your countersink jobs, then the countersink set is a must-have in your toolkit. Don't miss out on this high-quality countersink bit metal set. So, what are you waiting for? Get your hands on the countersink drill bit set for metal today and take your drilling skills to the next level. 【100 extra-long warranty period】：if you have any questions about the product, please contact us and we will answer you within 12 hours. If the hexagonal handle breaks, refund or replace for 100% . - Precision Countersink Bit Set for Metal, designed for drilling in copper, aluminum, and wood surfaces - Featuring M2 Cobalt Countersunk Bits and 82 Degree countersink angle for a perfect fit - 5 Flute design allows for smooth and fast drilling, providing accurate and consistent results - Comes with 5 Pieces including 1/4 Inch Hex Shank drill bit for easy use with drills and drivers - Complete Countersink Set for metalworking and woodworking needs, ensuring smooth countersinking every time