The S7 Big Box GE KeySafe attaches to any wall or flat surface with 4 dynabolts (provided) and accomodates access cards and amultitude of keys, including bigger keys such as car keys. The S7 Big Box GE KeySafe is supplied with a black neo-prene cover which just simply lips over the GE KeySafe, hiding it from view and protecting the GE KeySafe from the elements. Weight 1,700g. External size 4¾" (H) x 3½" (W) x 2½" (D). Internal size 3¾" (H) x 2¼" (W) x 1¾" (D)