This Onward(R) corner bracket is made of robust, black powder-coated steel. Designed to connect and align materials, or to reinforce old and weakened furniture, this product is 4.5" wide, 3" long, 3" high and has a thickness of 0.25". This weather-resistant corner brace can be installed both indoors and outdoors. The mounting hardware is sold separately. Thanks to its wide holes, this product is slightly adjustable.