Stand offs are small metal or plastic "buttons" that are use to keep a mounted sign "floating" or "standing off" the surface. The stand off is mounted from the rear with a screw and the sign is mounted thru the stand off with a cap or cover. This cap is over the face of the sign that it is mounting. Stand offs are available in aluminum, brass, stainless steel and bronze. they are available in a variety of sizes and shapes to suit many different appications. Stand offs are a very elegant and unique way of mounting signs, especially plexiglas or glass. A very modern approach for the high end application.