We have the tricone, PDC, button, chiesel, cross, bits used for the Petroleum, mining project, construction engineering. Product name ... type ......Size of Bits ……… API Screw ……… Torsion in ……… in ……… kN·mTricone bit TCI & steel ... 26 ……… 7 5/8 ……… 46.1-54.2 Tricone roller bits