Threaded Drill Bit
Bit skirt：normal and retrac
Bit diameter: 33mm to 203mm
Bit face: flat, concave, convex and drop-center
Bit type: cross type, X type and spherical / ballistic / parabolic button bit
Bit thread: R22/25/28/32/38, SR28/32/35, T38/45/51, GT60, ST58/68
Quality aircraft alloy steel and tungsten carbide, optimum design, state of
art manufacturing, multiple precise heat-treatment.
Highest penetration rate, maximum wear resistance, longest lifespan and
outstanding performance in roughest working conditions.