This hammer crusher is made of manganese steel which is much harder than carbon steel. This machine is applicable to dry or contain less than 20% moisture in coal, ore, rock or other medium hardness material. Rock crusher is used for coal, electricity, chemicals, building materials, geological exploration , teaching and research industries and sectors. Suitable for crushing materials: pellbes, coal, ceramics, quartz stone, slag. This hammer machine is 220V 1.5kw, shipping with a wooden box, heavy machine with perfect after-sales protection.