Abstract: A unique and simple apparatus and method allow one to simultaneously level a closure, such as a door or window, in an opening in a wall while also anchoring that closure to the wall. The apparatus includes a spring shim and an anchor. The spring shim has a pressure foot at each of two ends for engaging either the wall or the closure and an intermediate portion having a central aperture for receiving the anchor. The closure is leveled and plumbed in the opening by attaching a series of spring shims at spaced locations around the closure. The closure and attached spring shims are then positioned in the opening followed by the engaging and penetrating of the anchors into the wall.