November 20, 2014. From National Driller magazine.
The ROK 600T DTH Hammer, T Series to be unveiled at NGWA 2014 Expo.
Rockmore International is introducing the first down-the-hole (DTH) hammer in its new line, the ROK 600T.
The 6-inch class model, like the rest of Rockmore’s T series hammers, uses drill bits with standard shank connections that don’t have embedded plastic parts often referred to as foot valves or blow tubes.