Abstract: A one-piece molded plastic item, having an original and unfolded condition, and foldable into the double condition, and having ribs and channels on one surface in the unfolded condition which interface in the folded condition and form recesses for receiving the actuating lever of a switch. It has locking pins entering into holes in the switch lever. The recess is at an angle corresponding to that of the switch lever, and a binding effect is produced between the recess and switch lever. The folded halves of the item produce a self-locking effect. A second form can be applied to a plurality of side-by-side switches, but is not folded but receives the switch levers in recesses.