Quick-Acting Drill Press vise is the Most Fully-Featured, Best-Working Drill Press Vise for Holding Small Workpieces while You Bore Holes, Rout Mortises and Perform Other Operations. It offers 4" wide jaws that adjust rapidly with a push-button, quick-release mechanism. It can be mounted easily to your drill press table either directly on Your MARK 7 / MARK V 520, 510, 505 / MARK 4 with the included sliding T-Nuts. If you have a MARK V 500 You will mount through Your saw table insert using C-Clamps (not included).