... are used for fastening. hydraulic jack,hydraulic cylinder ,hydrualic tool RMC-100Tonnage tons: 10T work travel of 11mm, weight of 1.5kgRMC-200Tonnage tons ... tons: 30T work travel of 12mm, weight of 4.5kgRMC-500Tonnage tons: 50T work travel of 16mm, weight of 7kg hydraulic jack,hydraulic cylinder ,hydrualic tool