Self Centering Hinge Drill Bit Set for Woodworking Window Door Drill Bits 8Pcs 5mm 1 4'' 5 64'' 7 64'' 9 64'' 11 64'' 13 64''

* Specifications: 5/64" - can drill a hole for screws whose diameter is 2.2-2.8mm (hole diameter is 2mm)  7/64" - can drill a hole for screws whose diameter is 3-3.5mm (hole diameter is 2.8mm) 9/64" - can drill a hole for screws whose diameter is 4-4.5mm (hole diameter is 3.5mm) 11/64" - can drill a hole for screws whose diameter is 5-5.5mm (hole diameter is 4.5mm) 5mm - can drill a hole for screws whose diameter is 5.5-6mm (hole diameter is 5mm) 13/64" - can drill a hole for screws whose diameter is 6-6.5mm (hole diameter is 5.2mm) 1/4" - can drill a hole for screws whose diameter is 7-7.5mm (hole diameter is 6.35mm) * Package Includes: 1 x L Wrench 8 x Centering Drill Bits * Tips: 1. Use low speed when drilling (usually keep in 2000r/min - 3000r/min). Too fast speed will off center, break the bit or jammed 2. When drilling the hole, please adjust according to the hardness of the wood. If the wood is soft, you can choose the smaller center drill bit. If the wood is hard, you can choose the corresponding or bigger one * We provide perfect customer service, you can buy with confidence. If you have any questions about our products, you can feel free to contact us.