Drifting and tunneling rock drifter rod, Hex.22, Hex.25, Hex.28, Hex32, Hex35, MF, Extension drifter rod, M-F rods, Male female drill rods, MF rods. Drifter rod, another names are tunneling steels, tunneling rod, drifting drill rod, has round and hexagon rod available, most of drifting drill steel with drill steel hexagon is for tunneling and drifting drilling application. Hexagon rods are more rigid, heavier and transfer energy more efficiently, while increasing flushing. Drifting and tunneling rock drifter rods: Drifter rods R32-Hex.25-R25-Length(2100mm-3700mm) Extension rods R25-Hex.25-R25-Length(915mm-3050mm) Speed rods R25-Hex.25-R25-Length(610mm-1220mm) Drifter rods R32-Hex.28-R28-Length(2400mm-4920mm) Extension rods R28-Hex.28-R28-Length(3050mm) Speed rods R28-Hex.28-R28-Length(3050mm) Drifter rods R38-Hex.32-R28-Length(2900mm-4310mm) Drifter rods R32-Hex.32-R28-Length(3090mm-4310mm) Drifter rods R38/T38-Hex.32-R32-Length(2400mm-5530mm) Drifter rods R38/T38-Hex.35-R32-Length(3090mm-6100mm) Speed rods T38-Hex.35-R32-Length(3700mm-6400mm)