Our T60 benching & production drilling tools, GT60 thread button bits are designed to comply with all kinds of rock formations and drilling site conditions, with longer life, higher penetration rates etc.. Specifications: Material: Alloy steel bar 45CrNiMoV and tungsten carbide tips YK05 Body type: Normal body or retrac body 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 GT60 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; R28-37mm, R28-38mm, R28-41mm, R28-43mm, R28-45mm, R28-48mm; R32-41mm, R32-43mm, R32-45mm, R32-48mm, R32-51mm, R32-54mm, R32-57mm, R32-64mm, R32-76mm; T38-64mm, T38-70mm, T38-76mm, T38-89mm, T38-102mm, T38-127mm; T45-76mm , T45-89mm, T45-102mm; T51-89mm, T51-102mm, T51-115mm, T51-127mm; T60-92mm, T60-96mm, T60-102mm, T60-115mm, T60-118mm, T60-127mm, T60-140mm, T60-152mm etc.