In order to improve the production efficiency of machine tools, more and more double-sided, four-sided and multi-piece clamping fixture products. In order to reduce the installation time of the workpiece, a variety of automatic centering clamping, precision flat jaw pliers, lever clamping, CAM clamping, pneumatic and hydraulic clamping, and so on, fast clamping features continue to push out the old and bring forth the new. The new type of electronic permanent magnet jig, only 1 ~ 2 seconds to tighten and loosen the workpiece, the jig structure is simplified, for the machine tool for multi-station, multi-surface and multi-piece processing to create conditions. In order to shorten the time to install and adjust the jig on the machine tool, the Swedish 3R jig only takes 1 minute to complete the installation and correction of the wire-cutting jig. The ball lock clamping system of American Jergens (Jenkins) company can locate and lock the fixture on the machine tool worktable within 1 minute. The ball lock clamping system is used to replace the fixture on the flexible production line, which can shorten the downtime and improve the production efficiency.