8977 Features: -Switch box grip-lok. -Designed to be used with any deep switch box that has plaster ears. -Simply slip grip-lok between box and wall, then bend tabs into the box. -Supplied as a pair. -Use pair to mount switch box with plaster ears in hollow wall, 1.88" long legs. -Dimensions: 3.44" H x 5.25" W x 0.02" D.