The set is easy to set up and use. The first bit (#54310) shapes the surface of the stick; cutting from each side completes the contour of the ball. Then a second bit (#54312) is used to shape the socket. A third bit in the set (#49498) is used to shape the end of the tambour, which provides a place to attach a pull to open the finished tambourine. And the assembly is simple. Simply slide the slats together to create a beautiful, flexible tambour that is perfect for creating your own roll top desk, bread bin, kitchen countertops and more. #54314 Unique 3 piece router bit set with antique solid brass knob, shapes tambourers that connect to a ball joint. Unlike ordinary tamburn, there is no need for fabric, glue or wires. Approx. 1/5 0.39" x 1", Minimum radius for tambour door is 3-1/2", Max RPM 28, 000, 54314, 3-Piece Carbide Tipped Tambour Door/Appliance Gate Garage Door 1/2" Shank Set U. S. Patent No. 7 810 532