an anchor device and system for coupling soft tissue to osseous tissue includes a stopper member that supports a loop of suture material . a fixing member includes features that allow it to be rigidly coupled to surrounding bone and thus hold the stopper member in a cavity within the bone . the loop of suture material , in turn , supports a second suture device , which is coupled to , and thus retains , the soft tissue . in certain embodiments , the stopper member includes a mechanical linkage for coupling it to the fixing member , and surface features that resist withdrawal of the fixing member from the bone .