R32, T38, T45, T51 GT60 Top Hammer Button Bits Drill
Thread type: R22,R25,R28,R32,R38,T38,T45,T51,ST58,ST68,GT60. Diameter: 32mm-127mm. Button bit shape: spherical and ballistic. Face shape: Flat shape and drop-center shape. Main threaded button bits are: R22-32mm, R22-36mm, R22-38mm, R22-41mm; R25-33mm, R25-35mm, R25-37mm, R25-38mm, R25-41mm, R25-43mm, R25-45mm;
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