MaterialThe hidden hinge drill bit is made of alloy steel, with sharp teeth, the depth can be adjusted freely, the circular arc curve cutter head, chip removal is convenient, the punching efficiency is higher, the attachment is durable and easy to carry; The drilling locator is made of high quality industrial plastic, durable. You will get1x 35mm drill bit; 1x drill locator; 1x Allen key; Drilling diameter: 3.5cm, adjustable drilling depth: 1-4cm; Total length: 7.8 cm. Easy to useDetermine the position of the hinge, the drill bit positioner faces upwards, and the screw is fixed to the edge of the board; use the 33mm positioning drill bit to open the hole and install the hinge; draw the corresponding drilling position on another board to install it. Practical drilling toolSuitable for 35mm hidden hinges. Thanks to the hinged drilling template, the door can be installed quickly and easily without special tools. Wide applicationSuitable for drills such as bench drills, electric punching drills, electric hand drills, engraving machines, etc. For solid wood/mahogany/plywood/pressed board/plastic board and other wooden materials.