... ton Self-lock trapezoidal screw worm gear screw jack rotating screw detailed informations:1.Model:RN-0.5T, ... multiple jacks systems,fully synchronizationAccessories: Protective Tube, Rubber Bellows, Electric Motor, Hand Wheel, Inverter, Limited Switches, Linking Shaft, Coupling ... Block Bearing, Counter, Bevel Gearbox, Swivel Plate and Trunnion Base.Features: * Top End: Top Plate,Clevis End,Threaded End ...