Corner brackets braces are made of aluminium. Thickened design is sturdy and durable. These sturdy, rust-resistant, 90-degree right angle corner braces can be installed easily. L brackets can be used to build a frame or served as a corner connection, like fastening chair, wooden table, wooden bed, windows, shelf, furniture, device etc. None of the countersink holes has any burrs, easier for you to use. Including four corner brackets per set, it will meet your needs.4040 Size: Approx. 40 x 40 x 36mm / 1.57 x 1.57 x 1.42inchColour: blackMaterial: aluminumPackage Contents:4 * Corner bracketsOnly the above package content, other products are not included.Note: Light shooting and different displays may cause the color of the item in the picture a little different from the real thing. The measurement allowed error is +/- 1-3cm.