How to install concealed hinges like a professional: 1. Gather the necessary tools: You'll need a drill, a screwdriver, a plunge router, a jig, a pencil, a measuring tape, and of course, the concealed hinges and screws. 2. Measure and mark: Determine the desired position for your concealed hinge on both the door and the door frame. Use a measuring tape and a pencil to mark the exact locations. 3. Prepare the door: Place the door on a stable surface, ensuring it won't move during installation. Al