[Mark Positioning] The hinge hole position base mark is integrated into the double-bearing design, enabling quick and precise alignment for drilling. This feature ensures fast and accurate installation of hinges after holes are drilled, streamlining the cabinet door mounting process for improved efficiency and professional results. [Easy to Use] It is easy to use any drill, suitable for any handyman who needs to make hinges. The upper and lower three-bearing drill sleeves, and drill bit swings small, accurate to drill holes. The 3-17mm margin of buckle is set in place at once, convenient to adjust and high fault tolerance rate. [Premium Stainless Steel Material] Crafted from high-quality stainless steel, this concealed door hinge jig ensures exceptional durability, precision, and resistance to wear and corrosion. Its robust construction guarantees accurate positioning for flawless hinge installation. Additionally, the thick rubber head provides superior friction, preventing slippage or displacement during use, even under external force, ensuring stability and reliability for professional woodworking and cabinet mounting tasks. [Adjustable Design] The adjustable clamping range is 0-30mm thick wood boards, quick multi-angle drilling to install cabinet door hinges. It is suitable for most 35mm cabinet hinge fixtures. The opening depth can be adjusted by 10-15mm, and the drill edge distance can be adjusted by 3-17mm.