Behappy Countersink Drill Bit Set, 5Pcs M2 Hss Tapered Wood Countersink Drill Product Details Countersink Drill Bit Set?4 Flute countersink cutter #45 Carbon Steel tapered countersink set 5 sizes drill bits with countersink #4 (7/64"), #6 (9/64"), #8 (11/64"), #10 (3/16"), #12 (7/32") Adjustable wood countersink, 1/8" Allen Key Hex Wrench counter sinker drill bit for wood. Counter-bore and wood plug size 3/8" and 1/2". Hex shank compatible with 1/4 inch standard Quick Change chuck including impact drills Material: The counterbore drill bit is made of HSS M2 Grade 6542, with high hardness, wear-resisting, not easy to break, not easy to rust, and provides the excellent cutting ability. Wood countersink bit with wider flute shape for increased chip flow. Bits secured with pin Never Come Loose from the shank. Drill countersink set with logo brand name laser printed on each countersink bit quick change 1/4" hex shank Conical Design? Sharp taper twist bit charmer 82 degrees, cutting faster, can quickly and cleanly drill smooth holes. Adjustable countersink drill bit with quality built depth adjustable counter bore attaches to flat on the shank with 2 hex screws for controlled pilot hole depth Adjustable? Best adjustable wood countersink drill bits set ideal for woodworking. The high-quality countersunk hole is fixed on the plane of the handle by the hexagon socket screw to prevent loosening to ensure a firm fit and can be adjusted for controlled pilot hole depth Service: Countersink drill bits are suitable for bench drills, hand drills, and conventional electric drills, perfect for wood, fiberboard, particleboard, plywood, plastic, PVC, rubber, etc. BeHappy is a specialized tool product, buyers satisfaction is our most sought goal. If you have any doubts about our products, you can contact us, we are happy to help you solve the problem Payment We accept PayPal and credit cards via PayPal. Taxes - US We collect sales tax, as required by law. Shipping We make every effort of shipping within 3 business day of payment clearing. The estimated delivery time is 2 - 5 business days from the shipping date. Policies If you do need to return your item, please contact us via email (you will receive an email when your product ships with additional details - Subject: Important information about your purchase). You will then be provided with a return shipping label and packing slip. Pack the item carefully. Include the packing slip, apply the shipping label, and return the item within 30 business days of the date you request a return, or your return will be canceled. Once we receive your order we will inspect the return. Please allow up to 5 business days of receiving the returned item for your refund.