Self-centering hinge drill bits, hexagonal shank centering drill bits, 5 mm and 1/4 inch drill bits, centering hole drill bits

About this product

**Instructions for Use** - Before using this product, please tighten the screws securing the drill bit and spindle; otherwise, the drill bit and spindle may fall off during installation. The drill bit and spindle are spring-loaded; if the screws loosen, they may fall out. Simply loosen the screws slightly to remove the drill bit.**Two Sizes** - This center drill set includes two different sizes of hinge screws: 6.35 mm (1/4 inch) and 5 mm. You can choose the appropriate center drill bit based on the hardness of the wood and easily change it after removing the screw.**Smooth Operation** - These hinge drill bits allow for precise positioning of mounting holes for hinges and other hardware. You can add a small amount of lubricant to improve the internal structure of the drill bit, making it operate more smoothly and preventing jamming.**Durable Material** - The drill bit's yellow tip is made of high-quality brass, which is wear-resistant, rust-proof, and durable. 4241 high-speed steel drill bits are sharper and have a longer lifespan than traditional drill bits.

Drill bits for drilling holes in shelves: The center ring ensures precise positioning and prevents any movement. Suitable for woodworking, cabinet making, furniture manufacturing, and other wood products industries.