Most seasoned jewelers will tell you that no bench is complete without one. Though it is hard to explain why. Once you have installed on your bench you will find that its use is not specific but useful in almost every activity. Simply it allows you to maneuver, manipulate, saw,tap ,hold and fasten your work in a fashion that would be otherwise cumbersome on a tabletop like surface. Clamp accommodates up to 2" table thickness mounting.