These sets are the ideal choice for anyone who wants to make high quality raised panel or flat panel doors. Each set combines one of our most popular rail and stile bit sets with one of our exclusive Quadra-Cutâ„¢ Raised Panel Bits. All sets Feature Freud's NEW Premier Adjustable Rail & Stile Bits with Freud's exclusive long tenon technology for the strongest possible rail and stile joints. All bits have 1/2" shanks and are suitable for use with table-mounted router