Clamping work to a bench surface between dogs is a very old technique. The historical record gives us examples as far back as the Roman era, but most woodworkers know the tail vise from the modern Scandanavian and German tradition. The oldest detailed drawings we have are from the early 16th century by German author Martin Löffelholz.
The vise uses a pair of either wooden or metal dogs, one of which remains stationary, and one of which moves to pinch work of varying length between them. The simpler of the two vises is often referred to as a wagon vise since the moving dog travels in a block trapped within the bench top and rides along a pair of rails, like a wagon or cart. It is this type that this design is based on.
Unlike other tail vises, the Benchcrafted Tail Vise utilizes a moving dog block and nut, and a stationary screw. The dog block rides alongside the screw to allow nearly the full length of the screw to be utilized. The benefit here is that the screw remains in the same position at all times, never protruding past the end of the bench. The left-hand thread, precision-rolled acme screw provides for typical rotation when operating the vise. Operating the vise is intuitive.Assembly & installation instructions can be downloaded here.