For safer and more close drilling, the DELTA 20-619 6-inch Drill Press Vise you clamp the materials you 're working on securely to your workbench. With a flying release that lets you adjust to assorted sized workpieces with a flying and simplistic sliding of a tightening screw, you 'll be to get things done faster. A last tightening can be with a turn of the crank handle. The vise cast iron construction, and has slots so you can mount it to drill press tables. The jaws of the vise are inches broad-brimmed and are pre-drilled for supplemental jaw plates.