The medium could not be loaded. The spine glue nozzle creates strong and self-levelling joints. Adjusting so that the center of the cutter profile is in the middle of the material, cut one piece right side down and the other piece right side up for both halves of the joint. This amazing cutter can cut plywood, hardwoods and softwoods. Can be used on CNC and other automatic routers and portable desktop routers. Grade Minimum Bearing Thickness: 7/20" Maximum Bearing Thickness: 1-1/6" Blade Material: Carbide Tip Finish: Plated steel shank for maximum durability. Make sure it's installed correctly, otherwise you might mess up the project. Excellent value for money and quality.