Mount your bowls snugly and securely with this dedicated chrome plated 4" Faceplate / Screw Chuck with 1" long screw & 8 counter sink mounting holes. Just mark the center of your blank then screw on the chuck at the marked center then secure with mounting screws. The combination of screw chuck and faceplate mount provides a very safe and secure bowl turning setup. 1" x 8tpi faceplate mount. Includes mounting screws.