China T38 T45 T51 Threaded Button Drill Tungsten
T38 T45 T51 Threaded Button Drill Tungsten Carbide Button Bits for Rock Drilling Thread Button Bits Thread button drill bits are made by high quality alloy steel bar and tungsten carbides. Through heat treatment, our drilling tools are tough enough to meet rock drilling demands and have the least loss of energy while drilling the rocks.
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