Roman Carbide 2-1/2in Crown Moulding 3-1/2in Dia. 1in Bore DC2205. All cutters are manufactured with C-2 carbide. Package Contents: Roman Carbide 2-Crown Moulding 3-Dia. Bore Roman Carbide DC2205 2-1/2in Crown Moulding 3-1/2in Dia. 1in Bore