The Wilton 2900240A Vise Spindle Nut W/Two Pins provides secure and stable clamping performance by maintaining proper spindle engagement within compatible vises. This component threads onto the vise spindle and works in conjunction with the internal screw mechanism to convert rotational handle movement into smooth linear jaw motion. The included two pins help ensure accurate alignment... https://www.wholetoolbox.com/wilton-2900240a-vise-spindle-nut-w-two-pins