Like all PEAK Fishing products, the C-Clamp is rigorously engineered for maximum performance and durability. The clamping jaws ride on 2 precision guide pins keeping the jaw faces parallel. Unlike a typical clamp screw, there is no rotating clamp pad causing your vise to "walk" as it&&';;s clamped to the table, and it won&&';;t scratch or scuff the finish. The rabbeted face engages the edge of your table, so your vise won&&';;t rock. Works with 3/8" shafts and the Clamp will also accept our Accessory Post. The lower jaw can be flipped for clamping onto surfaces from 11/16" to 2-1/4". Now you can mount your vise on anything from a banquet table to a picnic table.