... Certified by API Detailed Product DescriptionPDC bit Main cutter:13mm,6 blades Oppose-circumnutation design suitable for ... bits,pdc bits,tci bits,tricone bits,rock bits.<2>steel tooth bits,drill pipe,scrap drill bits,junk drill bits,scrap tricone bits,junk tricone rock bits,new rock bits,scrap pdc ... better stablity of the bit.2 Main cutter is high performance PDC cutter to insure service life of the ...