Procedure Packs incorporate .10 and .08 17mm files along with 1 each of a size #40, #35, # 30 and #25. K3 is a third generation, triple fluted, asymmetric endodontic file system. Designed to cut quickly, efficiently and safely, with unparalleled debris removal, the K3 addresses technical and procedural issues that no other endodontic instrument does.