The 35mm hinge bore jig kit is made of high quality aluminum alloy with precision, precise positioning and easy operation. Effectively prevent injury during operation, ideal for drilling hidden hinges and door locks. The concealed hinge jig can adjust the plywood with a This is a great tool kit for furniture factories and woodworking enthusiasts. normally adjust the depth and then lock the limit ring. Easy to use with any drill bit, no special tools required.Suitable for drills, pistol drills, bench drills, vertical drills, portable electric drills, vertical electric drills, magnetic walking belt drills, etc.Easy to install , assemble and disassemble, convenient and practical. Note: The data is all manual measurement, please allow 1 - 3cm error, due to the difference in light and display , there will be a certain color difference, depending on the physical object received.