Characteristic: Positioning precision,Safely self-locking,Heavy duty,Uniform lifting speed,small sizes,easy installation. 1.Model: RN-0.5T,1T,2T,3T,5T,10T,15T,20T,30T,40T,50T,100T2.Configuration: worm shaft,worm gear,bearing,oil seal,housing and lifting Screw3.Function: Elevating, Lowering, Pulling, Pressing, Pushing,Rotating4.Power Source: Manual or Electrical5.Characteristic: Positioning ...