National Hardware N351-484 Black Wide Corner Braces 90 Degree 1.6 x 5 x 1/8 in.
Building Materials And Products. Product Type: Wide Corner Brace. Power Tools. Depth: 0.125 in. WIDE CRNR BRC 1.6X5X1/8″. Corner Type: Inside/Outside. Height: 1.6 in. Finish: Black.