A line lock includes a body at least partially bounding a plurality of passageways such that a suture can only be drawn through the passageways along one direction. The suture may be inserted through the passageways through the use of a cartridge designed to contain the line lock. Threaders may pass through the line lock within the cartridge. Each threader may have a leading end and a trailing end that can be coupled to a suture end. Thus, two suture ends may be drawn through the passageways by coupling them to the threaders and drawing the leading ends of the threaders to cause the suture ends to pass through the passageways according to the desired pattern. The cartridge may then be opened to permit easy removal of the suture and the line lock.