Countersink Drill Bit Set,5Pcs 8Mm Round Shank Screw Drill Bit Product Features ?5PCS 8X8mm Set?Our Countersink drill bit sets included 5 kinds of sizes: 2.8 x 8mm, 3.0 x 8mm, 3.2 x 8mm, 3.5 x 8mm, 4.0 x 8mm bits, very suitable for drilling holes, opening range is 2.8-4mm, and adjustable cutting height: 2.5-10.5mm. ?Premium Material? These countersink drill bits are made of high quality alloy steel, carbide tip: YG8, durable and corrosion resistant. High hardness and wear resistance, convenient and quick to drill a hole. ?High Efficiency Design?Quickly and accurately drill a smooth hole. Better in centering and no skid. It can effectively prevent the accumulation of debris retention, improve the drilling efficiency. ?Clean and tidy?Countersink drill bits make perfect countersink holes for flat head and plug screws, eliminating the need to split wood and allowing you to enjoy clean engineering with the drill set. ?Widely Application?Perfect for wood, fiberboard, particleboard, plywood, plastic, PVC, rubber, etc. Suitable for drilling machines with chucks such as lithium electric drills, hand drills, bench drills, etc. Widely used suitable for DIY, home and general building or engineering using, etc. Shipping: Shipping is complimentary within the lower 48 US States. We Do Not Ship to PO/APO Boxes, HI or Alaska We Do Not Ship Outside of the Continental US All items ship within 24-72 hours of Payment For large items that require Freight shipping a valid phone number is required to call and schedule your delivery Terms of Sale and Feedback: Feedback is extremely important to us and If you are satisfied with our transaction, please take a moment to leave Positive Feedback. YOUR Satisfaction is our #1 Priority! If there are any issues, PLEASE contact us BEFORE leaving a neutral or negative rating so that we may resolve any concerns. We PROMISE we can make you happy if you give us a fair chance. Returns / Concerns: All items qualify for returns within 14 - 30 days of receipt. Buyer is responsible for return shipping on any item that is not damaged Please be sure this is an item you want before making your purchase. Customer Satisfaction is our TOP priority! All items are IN STOCK at time of listing. Inventory changes constantly and it is impossible to maintain a perfectly accurate count of all items. Please do not penalize us if we have to issue you a refund! Thank You For Your Business!