2. Easy to use: With limit ring to adjust the drilling depth. Equipped with universal clamps for stable and firm clamping. The drilling sleeve adopts bearing guide drilling sleeve, which makes drilling more stable and easy. 4. Integrated design: Built-in hinge locating holes for quick positioning of the screw holes, and the included limit frame can accurately locate the exact distance from the center of the hole to the edge of the wood. The integrated design makes the main body more solid and not easy to shake. 1. High quality and material: All aluminum alloy products, beautiful and . Distance from door end to infinite hinge position is 68mm. Suitable for hinges with 3mm, 4mm, 5mm and 6mm offset. 35mm reamed holes with small drill bit to locate the holes. 3. Adjustable drilling depth: Adjust the distance between the limit ring and the drilling sleeve to determine the drilling depth. This hidden hinge jig is suitable for wood boards with a thickness of 15mm to 25mm. With it, you don't have to worry about damaging the cabinet door anymore. 5. Outstanding woodworking tools: The upgraded hidden hinge jig kit has perfect drilling effect without leaving traces, complete tools, easy to disassemble and install, very convenient to use, it is a good tool for furniture factories and woodworking enthusiasts, as well as a small family helper, your good choice., Manufacturer: Akfldms