When using DTH hammers, stabilizers are commonly utilized to ensure that the pilot bit is centered and uniformly loaded in the pilot hole. In addition, they increase the rate of penetration, control deviation and reduce bending stresses in the drill string during raise reaming, reducing drilling costs per foot. Tungsten Carbide hard facing on blades provides excellent wear resistance while drilling in abrasive formations.

Drill collars are a heavy, thick-walled tube, used between the drill pipe and the bit in the drill stem, used to stiffen the drilling assembly an put weight on the bit so that the bit can drill.