OGEE RAISED PANEL/BACK CUTTERRaised panels fit standard panel grooves, even when the panel thickness exceeds 5/8". As the main cutter raises the front of the panel, the back cutter mills the back to produce a standard-thickness tongue around the panel. Each tool is supplied with two different guide bearings, enabling you to stage cuts on curved edges effectively and safely. All tools have 1/2" shanks. Must be used in a table-mounted 3+ horsepower router and run at reduced speed. Multiple passes recommended. Note: Reveal ('A') reflects the total length of cut. Therefore, you must deduct 3/8" (usually) for allowing the panel to recess into the frame. Note: To recieve ('A1') use bearing #47763. Maximum RPM 12,000.