These devices are very suitable for breaking and crushing hard rocks (mountain and river) that have little wear, which have an output load adjusting screw, and due to the ability to adjust the anvils, it is possible to control the output load granulation. It is possible to replace abrasive parts such as hammers, hinges and anvils easily and in a short time.

Low depreciation of parts is one of the important advantages of these devices.

Various examples of these devices include GL-120, GL180, HS-10, HS-7 are preferred by most miners, which are supplied as usual or with hydraulic system.