This Bevel Rail and Stile Router Bit Set (99-764) creates any door in the 5/8" to 1-1/4" thickness range. The adjustable shims enable both a tight fit when using plywood panels and the ability to use thick panels (from 5.5mm to 6.35mm). The unique cutter geometry virtually eliminates tear-out. Plus, the top portion of cutter, including bearing and spindle, is removed to produce the front of the long tenon profile for blind tenons, through tenons, or bridle joints.