The electro-hydraulic clamshell grab can also be provided for diving works or poor environmental conditions. The garb has its own hydraulic system; all key elements are imported well-known brands to ensure the high performance of garb. Which is a kind of efficient tool for loading and unloading coal ,fertilizers, mineral powers etc small granular materials. It has been widely used in ports, steel plants, power stations, ships and garbage treatment plants,and is used together with tower cranes, ship cranes, ship unloaders, traveling cranes and other type of cranes.