The rock drill is a kind of Hand-hold and Air-leg rock drill machinery. It can perform in solid rock or moderately hard rock.The rock drill is mainly used in quarries, coal mines and blasting for constructing roads in mountain areas,also in the capital construction for water conservancy works. With hand-hold ,it can dill in omnibearing.This machine can drill downward with hand toward horizontal or acclive,when it is matched with air-leg model FT80 or FT100. This machine must work with drill and drill bar.The drill dia is 28-44mm,and the hole is ¡Ü 4m.