Freud 99-571: 3-1/2" (dia.) Raised Panel Bit W/backcutters with 1/2" shank, 1-3/16" large radiusSpecs: Large Radius 1 3 16", Number of Cutters 4, Overall Dia. 3 1 2", Overall Length 3", Shank Dia. 1 2", Small Radius 5 32", Carbide Height 1" Bits include backcutters to rabbet the panel back: 3 4" panels sit flush with 3 4" frame Patented design allows these bits to produce a full 1 1 2" wide reveal for traditional raised panel doors Cuts all composition materials, plywoods, hardwoods, and softwoods Use in table mounted routers with fence only