Roman Carbide 1-1/2in Crown Moulding 3-1/2in Dia. 1in Bore DC2207. All cutters are manufactured with C-2 carbide. Package Contents: Roman Carbide 1-Crown Moulding 3-Dia. Bore Roman Carbide DC2207 1-1/2in Crown Moulding 3-1/2in Dia. 1in Bore