Down-the-hole DTH rock drilling tools use compressed air as power drilling machine, according to the compressed air pressure difference, can be divided into: low pressure ( 0.6-1.0 Mpa ), Medium-high pressure ( 1.0-2.5Mpa ) two types, different types of drilling machines need to select thecorresponding drilling tool. GSS Drilling Tools’ DTH rock drilling tools are widely used in construction of stone mining site, hydropower construction site, cementproduction factory and mine, as well as part of a large underground metalmine use of larger aperture of rock drilling.