Edwards Signaling Mounting Brackets for walls or corners simply the installation of Edwards AdaptaBeacons. They may be used for mounting beacons that have either a 3/4" (19 mm) or 1/2" (12 mm) conduit opening. Backplates are made of stainless steel and bracket arms are cold rolled steel. The Corner Mount Bracket, Cat. No. CBR, can be used with surface installed 1/2" (12 mm) or 3/4" (19 mm) conduit mounting. The Wall Mount Bracket, Cat. No. WBR, can be used with either surface installed 1/2" (12 mm) or 3/4" (19 mm) conduit or concealed wiring. The Wall Mount Bracket mounts to a 4" (102 mm) square or 4" (102 mm) octagon electrical box or a 4" (102 mm) outdoor box. The Catalog Number 92-GRD Protective Lens Guard is an easily installed guard that provides protection against lens breakage.