It is an efficient tool for dredging deep sides of sea or lakes. The mechanical structure for opening & closing is succinct and original. No maintenance required except greasing. It is easy to use and can work under any circumstances in order. TECHNICAL FEATURES: It is used to transport cast loads which have 1-2ton/ m3 density. Automatic single rope system. It has a mechanism that gets it turned off or turned on automatically. Our products have the capacity between 0.5 m3 up to 5 m3 They are painted two times against the corrosion. bucket jaws are made of special steel material. It is used by attaching to ship and port crane hooks. Casted steel pulleys are used.