High quality Vise Grip holddown tool which is easy to use and adjust using familiar Vise Grip mechanics. Nice large bolt works well on a B&D Workmate and the large wingnut makes it easy to secure, tighten, and loosen to move around. There are similar devices on the market, but in my estimation none have come close to this tool. If you have a very thick workbench, the bolt will not be long enough. I would purchase more of them in an instant if they were still being made.