Cut half-round grooves for Fluted moldings, columns, millwork and signs using a core box bit. Used with an edge guide, It can cut coves. Can be used with handheld, table-mounted and CNC routers. Perfect for making flutes on CNC machines, perfect for juice groove in cutting boards, #45916, diameter (D) 5/8, radius (r) 5/16, cutting height (B) 7/16, shank (D) 1/2, overall length (L) 2, flutes 2, Carbide Tipped core box 5/16 radius x 5/8 dia x 7/16 x 1/2 inch shank