Leading in the manufacture of DOWN-THE-HOLE and TOP HAMMER drilling tools, ZR company produces drilling tools completed in variety. ZR brand drilling tools apply to constructions of wide range with high reliability. Drilling performance is top class in the industry. Widely used in the drilling of soft rock and hard rock, mining of iron ore, gold mine, and coal mine, construction of water well, geothermal and ground and foundation engineering, etc.
ZR drilling tools have been serving drilling constructions nationwide. And widely export to Russia, Australia, South Korea and more than 20 countries worldwide.

4" DTH hammer bits:
work for hammer: DHD340A. COP42. QL4. M40
Bit diameter: 115mm
Face: covex. flat. concave
Button: Gauge button: 8*14mm spherical button
Front button: 6*13mm ballistic button
Face shape and buttons accept customized-design and produce.
Flushing holes: 2
Weight: 8.2kg

for drilling of water well. mining, quarrying, geothermal.