PANEL MOUNTING HARDWARE SYSTEM. Stackable Extender Unit, 1/2" (13mm). Gain the ability to hang panels or frames on a wall by using the chrome plated steel Panel Mounting Hardware System. Will hold panels or frames from 3/8" to 1/2" thick (10 x 13mm). Install by using a wall molly anchor fastener (not supplied). Panel secured with adjustable set screw. The Panel Mounting Hardware System will add 7/16" (11mm) separation from wall, or add optional extender fittings for extra 1/2" increments. Use on the top, bottom or sides for extra support.