... tons Max dynamic load 26 tons Self-lock trapezoidal screws mechanical lifter detailed information:1.Model:RN-0.5T,RN-1T ... ,heavy duty,precision accuracy,low efficiency,use infrequently4.Arrangement: single units,in pairs or multiple jacks systems,fully synchronization5.Power ... Plate,Clevis End,Threaded End,Plain End and Forked Head.* Single Unit, In Pairs or Multi-Units Arrangement Available.* Anti- ...