|U.S. patent No. 6722643B1
The JSI MULTI-CLAMP was originally designed to allow for clamping away from the edge of the, or in the middle of a work table or sheet of plywood or steel because there was nothing on the market for that purpose. However, since it was designed and used we have discovered many other applications where it can be used.VERTICAL CLAMPING: Screwed or clamped up right for Vertical Clamping to the back of the Multiple-Clamp, then another Multi-Clamp can be used to clamp on top of that work piece to clamp at a 90 degree angle.