Ycwc series lightweight jack is a new type of prestressed through core jack which is manufactured by special process and lighter after structure improvement. It has the characteristics of good sealing performance, light weight and small volume. With different accessories, it can be used to tension different systems of clip group anchor, DM type upsetting anchor and LZM type cold casting anchor. It is widely used in pre tensioned and post tensioned prestressed concrete structures, components, bridges, power stations, highways, high-rise buildings, geotechnical anchorage, dam foundation anchorage and other construction projects.