T45, T51 102mm Spherical Button Shape Thread
T45, T51 102mm Spherical Button Shape Thread Button Drill Bit; T45, T51 102mm Spherical Button Shape Thread Button Drill Bit. 2021-07-19. Product Description: Panda 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 ...
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