Two workpieces can be clamped at the same time with one vise to shorten working time. The movable part and fixed jaw are made from aluminum, and thus lightweight. Therefore, cut the soft clamp yourself before use. The movable part can be attached and detached with one touch. The main body is made of ductile cast iron with flame quenching on the sliding surface, allowing it to be used as a single clamp type by replacing with the supplied parts.