High Speed Steel Drill Bits 7 pieces, ideal for drilling holes in smaller hinges for carpentry, cabinet, furniture maker and other woodworking or hardware projects such as decorative boxes. Dimensions: 5/64" 7/64" 9/64" 11/64" 5MM 13/64" 1/4", The stainless steel drill shank is 1/4" inch. Quick change composite cone uses the principle of drilling, boring and tapping, high working efficiency high. High hardness, rust-proof, strong and durable, positioning accuracy, does not move, chips are automatically discharged from both sides of the top of the hole, do not attack the drill bit. The drill bits are surrounded by spring guides that have a widow to show the bit depth during adjustments. Good DIY woodworking tools or professional engineers. Overview: 7pcs HSS Drill Bit Set with Self-Centering Hinge Drawer for Pilot Hole Guides. Specific: Hole Diameter 5/64": The hole cutting diameter is about 2mm, for 2.2-3.2mm self-tapping screw. 2.8 mm. 7/64": The hole cutting diameter is about 2.8