Special steel material with high ductility and high resistance It can be installed on the hydraulic excavator. The power is provided by the hydraulic pressure system on the excavator. The installment is easy with convenient and flexible operation Reasonable mechanics structure for outlook. The original imported motor is strong and durable. Strong resistant ability and cracking power. Imported cylindrical roller bearing with low noise, high speed and reliable. Effectively avoid hydraulic oil pollution? and metal residue from damaging the excavators hydraulic pressure system The product can be made as rotating type, split type in accordance with customers multiple requirements.