Climax Metal, CR-21-12, 1/4" x 1" Standard Tapered Type Mandrel for Cartridge Rolls, 12" OAL Quick change mandrels for coated abrasive cartridge rolls. Feature sharp, coarse threads which hold cartridge rolls securely in place during operation. Rust proof finish. Features Quick change mandrels for coated abrasive cartridge rolls Feature sharp, coarse threads which hold cartridge rolls securely in place in operation Rust proof black oxide finish