This vise screw is specifically for the type of ’L’ shaped shoulder vise used on Scandinavian style benches. It has a 1-1/8" (29mm) diameter screw with single lead Acme threads. The threaded guide is mortised into the vise shoulder, while the end guide attaches to the vise jaw. 9" (229mm) clamping capacity, 13" (330mm) overall.