Kaishan is the largest manufacturer of compressors in China and also engaged in specialized production of drilling rigs and supporting rock drills. We provide various wet-type hand held rock drills with low gas consumption and high efficiency. The rock drill is extensively used in drilling and blasting holes for quarrying, mining, roadway construction, and drilling operation, thus it is indispensable in mine, water conservancy, building materials, energy source, traffic, military industry and geological engineering projects. Our rock drill adopts H22 drilling steel with general blast hole diameter of 30-42mm to drill a hole as long as 5m effectively and economically.