The CRL 4-Way Mounting Bracket is fully adjustable to accommodate and adequately support 13", 18" or 26" (330, 457 or 660 mm) diameter Convex Mirrors. The Bracket can also hold only two each 30" or 36" (762 or 914 mm) diameter mirrors, and only if they are mounted on opposite arms, not at 90 degrees to each other. Bracket can also accommodate rounded rectangular mirrors. Mount it in hallways or heavy traffic areas where there is limited visibility and mirrors will enhance security and safety. Bracket can be extended to a maximum of 20" (508 mm). This product works in conjunction with the CRL Convex Mirror mounting hardware. This Mounting Bracket will accommodate both Circular and Rectangular mirrors.