R25 drill bit for hard rock drilling

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R25 button bit
Thread Drill Bits---Diameter: 51mm to 127mm
Thread Type---R22,R25,R28,R32,R38,T38,T45,T51
Face Shape---Plate, Concave, Convex.Bit Shank & Coupling sleeve---R22,R25,R28,R32,R38,T38,T45,T51

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