A suture anchor is described having a central shaft and at least one outwardly extending longitudinal rib. The ribs may have bone engaging elements such as threads or barbs on their outer surfaces. A bone boring tool having more than one set of sharpened cutting edges is described which creates a non-circular...http://www.google.com.au/patents/US6165203?utm_source=gb-gplus-sharePatent US6165203 - Suture anchor installation devices and methods
