Overturning clamp can tilt forward 45 degrees and backward 25 degrees with loading capacity from 2.5 ton to 6 tons in regular specification. Forklift mast has tilting function with 12 and 12 degrees toward forward and backward, but this degree level can't meet some special working areas like wood, architecture, construction, metal, livestock industry. But when a forklift installed a overturning clamp, it's tilting angles will increase to 57 degrees. Then forklift can dump most of all materials.