Sdrd manufacturers the best down the hole (dth) bits to fit the most popular dth hammers for drilling in water well, mining, construction, & quarrying industries. The bits are found to be the best favorite for drilling engineers in many countries because of their precision designs and efficient ... 10 254-305 mm flat/concave mission-6 203-305 mm flat/concave numa 254-305 mm flat/concave sdrd ...
