With the top quality of alloy steels imported from USA and the best carbides made in China, we produce all threaded button bits by hot press technology. Parameters: Thread size: R25, R28, SSR28, R32, SSR32, R35, SSR35, R38, T38, T45, T51, SST58, SST68, SGT60; Head diameters: 33mm ~ 152mm; Face designs; flat face, drop center, uni-face; Features Alloy buttons are hot mounted into the drill bit, ensuring the bit good accuracy and durability; Reliability ensured by premium drill bit materials and premium alloy button; Different types designed for different drilling scenarios and rock conditions; High speed and drilling efficiency; Cost-effective, good performance with reasonable price. Applications Drilling works for blasting duties in tunneling, construction, mining, quarrying, etc.