... Screw Jack 1. has a compact, 2.in the form of multi-input 3.small size, easy to install This Worm Screw ... Jack: 1. Model: JF-0.5T, 1T, 2T, 3T, 5T, 10T, 15T ... 2. Configuration: Worm and worm gear, bearing, housing and lead screw 3. Function: Elevating, Lowering, Pulling, Pressing, Pushing, Rotating 4. Power ...