a knotless bone anchor and method for securing soft tissue , such as tendons , to bone , includes a plurality of discrete components . in one variation of the invention , the bone anchor includes a proximal toggle component , an intermediate plug component , and a distal sleeve component . suture is looped around the plug component and once the anchor is actuated , the suture is compressed between the plug and the sleeve components . advantageously , one or more of the components may be made of a biocompatible polymer . the polymeric components may be detachably joined to a drive shaft using a plurality of sacrificial fills . the sacrificial fills are broken or severed during deployment of the anchor . related instruments and methods are also described .