Notice: Dear buyer friend, thank you very much for your purchase. Now because of the speed of express delivery in each country, it is not something we can decide, but it is decided by the post office of each country. If the buyer friend buys the products of our store. In the specified protection time, did not receive the goods . We are very sorry about this. Please contact us, we will help you solve the problem! (including full refund money and reshipment to you) Self Centering Drill Bit Set, Hex Shank Self Center Hinge Drill Bits Tool for Woodworking Window Door Hinge Self Centering Hinge Drill Bits: 5/64": Hole diameter is about 2 mm, which is suitable for self-tapping screws of 2.2-2.8 mm. 7/64": Hole diameter is about 2.8 mm, which is suitable for self-tapping screws of 3-3.5 mm. 9/64": Hole diameter is about 3.5 mm, which is suitable for self-tapping screws of 4-4.5 mm. 11/64": Hole diameter is about 4.5 mm, which is suitable for self-tapping screws of 5-5.5 mm. 5mm: Hole diameter is about, which is suitable for self-tapping screws of 5.5-6mm. 13/64": Hole diameter is about 5.2mm, which is suitable for self-tapping screws of 6-6.5mm. 1/4": Hole diameter is about 5mm, which is suitable for self-tapping screws of 7-7.5mm Note: 1. Please make sure the address is correct and we are not responsible for wrong or undeliverable addresses. 2. We fully understand it would be frustrated when the shipment takes longer than expected. As we promised, we will ship out the items within 7 day once payment clears, however, the shipping is controlled by the shipping company and we are just as anxious as you are. Low rating on shipping time would be unfair to us. Your understanding is highly appreciated. We hope our customers be happy when they received our items, so please only buy when the shipping time is acceptable for you. 3.Free shipping by ePacket to USA. 4. Our default shipping method is China Post air mail with tracking. Payment: 1. We accept Alipay only. 2. Simply click the "Pay Now" button at the top of your ended auction to submit a secure payment through checkout. 3. Final purchase price do not cover any applicable tax or duty that might be charged by customs .Buyers are responsible for such charges 4. If you have any problem on payment,please inform us. Return back and Feedback: 1.For any personal reasons (choose a wrong size / wrong color / doesn't fit ), you can simply email us to get the return mailing address and return the item(s) in its original condition. Return shipping charges will be the buyer's responsibility. We will not accept any items with odors (perfume, smoke, etc.) 2. If items are damaged, we must be contacted within 24 hours of receipt. 3. For other quality issues, we will refund immediately once we receive the photo of the item. 4. Item must be returned within 14 days after buyer received it. 5. Our Goal is to offer 5-Star Service if you do not feel that we deserve 5-Stars please contact us before leaving feedback. 6. Have questions on comments? We would be happy to hear from you! We are dedicated to our customers and feel you should receive the personal attention you deserve. We typically reply to e-mail within 24 hours during normal business hours.