2.Universal haum rau txhua tus qauv me ntsis tuav & cov cuab yeej fais fab.
3.Reinforced tip rau lub neej ntev dua tus qauv bit.ribbed tip withstand mus txog 50% torque ua ntej npaum li cas.
4.Chrome-vanadium-molybdenum cov cuab yeej steel lossis qib qib S2 cuab yeej steel yog tempered ntxiv zog rau kev ua kom muaj zog.
5.Heat trated tiv thaiv breakage thiab hnav .Tshwj xeeb tsim los txo stripping .
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