Multi-purpose clamps combine the best features of ordinary "C" and parallel clamps. Free-floating jaws adjust to un-parallel surfaces. Will not "walk off-center" when pressure is applied against jaw, because there is no unsupported screw or loose pad. All clamps are of rugged construction. Provides new freedom of movement. Eliminates distorting and twisting action of conventional clamps. Plus, it provides three different gripping surfaces. Copper plated jaws and screws are ideal for welding. Kant-Twist clamps weigh approximately half as much as comparable "C" clamps. All clamps close completely. Meets GSA Commercial Item Description A-A-548.