Designed for concrete production, they can be attached on excavators, skid steer loader, wheel loader, backhoes and telehandler. Made of wear and tear steel and of high quality to grand the maximum efficiency and life, they are equipped of mass production of electrical control, electrovalve with button for hydraulic opening of unloding plate, unloading piston, rubber tube for concrete unloading, protection grate, rubber pipes for hydraulic circuit, flat-head quick couplers and universal linkage plate for skid steer loader.