This mounting bracket is a great companion for commercial and non-commercial trailers. It is made out of durable and sturdy steel. Mounting is simple and placement is versatile. Measures 8-1/4 inches length x 4 inches width x 1-3/4 inches diameter. The oval cut out is designed for standard 6.5 inches oval lights. Customize your own light brackets with Grand General's quality lights, grommets and mounting brackets.