jack (lifting) features: Max static load 100 tons Max dynamic load 26 tons Self-lock trapezoidal screws jack (lifting) detailed information:1.Model ... 40T,RN-50T,RN-100T2.Function: precisely controlled lifting,lowering,pushing,pulling and rolling movements3.Self locking ... Nut Device Available.* Special Custom Design Available.Materials: * Lifting Screw: steel C45 (optional: stainless steel)* Worm Gear: ...