R32 52mm Drop Center Stone Retrac Rock Drill Bit
R32 52mm Drop Center Rock Stone Retrac Rock Drill Bit. Thread Button bit is well known for its high wear resistance on. medium-hardto hard abrasive rock formations (between 200 Mpa to 260 Mpa compressive strength). Featuring spherical tungsten carbide inserts that is known to have strong configuration against carbide fracture.
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