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Same as taper button bits, threaded button bits are most popular drill bits in the world now. Like threaded cross bits, button bits shapes can be cylinder or retrac. And the thread sizes can be R22,R25,R28,R32, R38,T38,T45 or T51,SR28,SR32,SR35,ST58,ST68,etc The diameters can be 38mm to 152mm, etc. Our all threaded button bits are hot pressed. Hot press is one most advanced production technologies in the world for button bits. And drill bits bodies are forged from very good quality of alloy steels. According to different drilling application, we have different face ,flushing hole ,hole opener, buttons shapes design to meet customers