Machine screwing vice with quick adjustment using just a push of a button you guide the clamping jaws until they are tight on the work piece that is to be tightened just one or two short turns more and the work piece is completelytight spindle with tetragonal thread the 100mm version is in addition equipped with two laterally applied guide rails rubber coated clamps and av block clamping jaw clamp width 65mm clamping area 65mm 10 years westfalia warranty