Zhejiang Oliver Gear Manufacturing Co., Ltd. was established in 1990. Our factory specializes in the production of electric hammers and crushers.We have been producing spiral bearing gears, cylindrical gear shafts, drill gears and various tool gears since 1990. In 2006, we invested heavily in the production of advanced electric hammers and electric picks. After 20 years of high-quality business development, we have won the trust of well-known enterprises. Designated supplier power tool manufacturer.