http://www.flyworld.com.au/view/20111102104708/
Gives greater height, locks into position. Easily adjusted. Barracuda add on for all rotary vises (excluding the side winder). Locates anywhere on 3/8th Spindle of a rotary vise. Tighten the material clip onto the spindle with the included wrench until it fit's snugly.
Chris.