Ease of use and high reliability make UNIMEC trapezoidal screw jacks suitable for a wide variety of uses. They can be employed to lift, pull, move, or align any kind of loads, with a perfect synchronism which can hardly be obtained with other handling methods. UNIMEC trapezoidal screw jacks are absolutely irreversible, that is, they can support their applied loads without needing any brakes or other locking system.