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 teeth 5 3/4 ……… 3 1/2 ……… 9.5-12.2Tricone bit TCI & steel teeth 5 7/8 ……… 3 1/2 ……… 9.5-12.2Tricone bit TCI & steel teeth 6 ……… ......3 1/2 ……… 9.5-12.2Tricone bit TCI & ...