Description: Professional Woodworking Tools:The Concealed Hinge Jig allows you to drill cup holes for concealed cabinet door hinges, and it is durable in use. Widely Used : Hinge Drilling Jig is suitable for 35mm and 40mm hinges . Function:Hinge Drilling Jig is made of high quality ABS engineering material, durable to use. This is a set of drill guide tool used for convenient hinge hole drilling. How to use: Determine the position of the hinge cup, and draw the center connecting line of the two planks. Mark the hole position of the base screw, mark the hole position of the base screw on another board, and drill the hole; install the hinge. Versatile Cabinet Hardware Jig :Works on virtually any cabinet door stile and rails including shaker doors and recessed drawer fronts. Perfect for all construction worker, professionals. Size Chart: 8.5cmx4cmx2cm/3.35inchx1.57inchx0.79inch Package Includes: 1 Hinge Drill Guide(4 Pack) Note: Please allow slightly errors due to manual measurement and different monitors.