SWL1T hand crank 1 circle screw rod up 0.66mm. Leading Screw Lift Handwheel Collar Cegar Swl1T/2.5T Hand-Cranking Worm Lifting PlatformSWL Lift Reducer. The screw lifter has a self-locking function, that is, the screw can be locked without falling down when it rises to a certain height.
