NOVA 8301 Infinity Accessory Jaw - Bowl Jaw Series #1 Designed to hold small bowls &amp; plates with much stronger Infinity Key grip than the single screw fixing of Nova Traditional JS20N &amp; JS25N Jaws External dovetail to grip internal bowl recess Stronger jaw design, over 12% thicker base, over 16% thicker jaw face than traditional Nova JS25N Jaws for max stability &amp; rigidity for small work Over 30% more external dovetail recess depth compared to traditional Nova JS25N Jaws means more useable grip available Designed to hold small footed bowls. The traditional Nova JS25N, JS20N not designed to hold footed bowls