Rock drilling tools manufacturer Litong: YN27C gasoline rock drills or petrol driven rock drill machine is powered by gasoline engine, without using air compressor, a very efficient machine with the characters that the structure is very compact, less of the-easy-to-damage-parts, and very easy to control. It can adapt to these outside situations there is no water and no electronic power. It is a kind hand held drill built up with gasoline engine, air pump, rock drill and the rotation plum bum equipment for running or stop. It can be used as a tool for breaking, percussive drilling, tamping besides rock.