Freud Rail and Stile Router Bit 99 061 1 2 Inch Shank (1 1 2 Dia 3 8 Carbide Height 5 16 Radius Ogee Profile Cabinet Door Frame Cutter) Radius Cove Bit Patented Extended Tenon Capability allows Patented Extended Tenon Capability allows for the milling of extra strong Extended Lower Jaw Architecture: Forward reaching lower jaw guides pipe acquisition in confined or visually obstructed cavities with single handed placement The 1 1 2 inch overall diameter bit features a 3 8 inch carbide cutting height with a 5 16 inch profile radius and non stick red Perma SHIELD finish always use a backing block or coping sled behind the workpiece as it passes the bit