Lifting mechanisms for hydraulic stern platforms which enable and ease hauling and launching of jet skis, tenders and dinghies. Available in more than twenty models, they are fully made of AISI 316L stainless steel and are supplied with the combination of two arms. They can lift from 300 to 1000kg. A connection bar between the two arms , a safety mechanism with a hydraulic rams block, adjustable plates and sliding mechanism are available as well. Sizes can be customised according to the boat dimensions.