The 3-In-1 Case Mouth Cutter from Forster creates a perfectly aligned, consistent chamfer on the inside and outside of the case mouth to help ensure benchrest quality handloads. Installs easily over the existing cutter shaft on all Foster Original and Power Case trimmers. Chamfers the inside to a 14° angle that works for both VLD boat tail and standard bullets. Outside is chamfered to a 30° angle, plus is fully adjustable for chamfer length. Long lasting carbide blades hold edge indefinitely with proper care.