Wide 2x4 Inside-Corner Bracket, Black, Anodized, Number of Mounting Holes 6, Overall Height 3 in, 21/64 in, Overall Length 1 1/2 in, Overall Width 2 13/16 in, Aluminum 6105-T5, Inside Corner Bracket Style Wide, 15 Series, System of Measurement Inch, Inside-Corner Bracket, For Slot Width 21/64 in