Features:Accurate positioning, no displacement, sawdust will be automatically discharged from the top of the drill hole on both sides, will not stuck the drill. The door and window hinge is fixed on the door and window by screw. This product is used for opening the door and window hinge screw hole. The drill sleeve can fix the position well and ensure the accuracy of drilling. It is a good tool to improve the efficiency of hinge drilling. Specifications:Material: Brass case, high-speed steel drill core, surface electroplating(A)7pcs include: 5/64'',7/64'',9/64'',11/64'',5mm,13/64'',1/4'', and hexagonal handle wrench. Weight: 213g(B)8pcs include: 5/64'',7/64'',2pcs 9/64'',11/64'',5mm,13/64'',1/4'', and hexagonal handle wrench. OPP Bag Weight: 246g8pcs drill plastic boxes: 305g(C)8 Hinged Drills + 8 Control Sleeve Bit Plastic Box: 350gPackaging size:The sizes of 8pcs drill plastic boxes:13.5*13.5*1.8cm/5.31*5.31*0.71"Usage:When opening, please adjust the hardness of the wood appropriately. If the wood is soft, you can choose the smaller size. If the wood is hard, you can choose the corresponding size or the larger size. Opening size:5/64": The diameter of the opening is about 2mm, and the self-tapping screw is about 2.2-2.8mm.7/64": The diameter of the opening is about 2.8mm, and the self-tapping screw is about 3-3.5mm.9/64": The diameter of the opening is about 3.5mm, and the self-tapping screw is about 4-4.5mm.11/64": The diameter of the opening is about 4.5mm, and the self-tapping screw is about 5-5.5mm.5mm: Opening diameter is about 5mm, self tapping screw is about 5.5-6mm.13/64": The diameter of the opening is about 5.2mm, and the self-tapping screw is about 6-6.5mm.1/4": The diameter of the opening is about 6.35mm, and the self-tapping screw is about 7-7.5mm. Notes:1. Due to the different monitor and light effect, the actual color of the item might be slightly different from the color showed on the pictures. Thank you!2. Please allow 1-3cm measuring deviation due to manual measurement. 1 XCenter Drill Bit Set