The mini screw jacks are designed to give linear movement for either light or heavy duty applications: for lifting, lowering, pulling or pushing to the full rated jack capacity. These versatile units can be used singly, in series or in multiple jacking arrangements. Electric screw jacks lifting system light weight is exported to Mexico, which is consist of 4-pieces mini jacks, 2-pieces mini gearboxes, couplings, connecting shafts and 1-piece single phase motor.