1.ISO9001:2000 2.certificate for product export 3. Lower part weight:20KG. Max. Striking capacity:0.22KJ 4.free forging * Applied to all kinds of free forging, extending, heading, punching, cutting, forging, welding, twisting, bending* the hammer is composed of two compress jar with one pole,double forging hammer*With sample structure, it can be operated, shipped, installed and maintained easily* ...