G20B Pneumatic hammerapplying: 1,Used for truncating coal bed and breaking soft ore into pieces in mineral industry.2,Used for destroying solid or frozen stratum in civil engineering,Website:http://www.nbydtools.com, underground construction and people protection construction, etc.3,Used for breaking old road surface in municipal construction and destroying the former concrete base during the course of equipment installation in industrial and mineral enterprise.technical data:Overall length:640mmWeight:17.5kg