1、Corner brackets braces are made of aluminium. Thickened design is sturdy and durable 2、These sturdy, rust-resistant, 90-degree right angle corner braces can be installed easily 3、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 4、None of the countersink holes has any burrs, easier for you to use 5、Including four corner bracket per set, it will meet your needs Features:  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 bracket per set, it will meet your needs. Specification:  Material: Aluminium Color: Shown As Pictures Options: Black 2020A, White 2020B, Black 3030, White 3030, Black 4545, White 4545, Black 4040, White 4040, White 2020A, White 1515A  Weight: 44 - 458g 2020A Size: Approx. 20 * 20 * 18mm / 0.79 * 0.79 * 0.71inch 2020B Size: Approx. 25 * 25 * 18mm / 0.98 * 0.98 * 0.71inch 3030 Size: Approx. 30 * 30 * 26mm / 1.18 * 1.18 * 1.02inch 4545 Size: Approx. 45 * 45 * 41mm / 1.77 * 1.77 * 1.61inch 4040 Size: Approx. 40 * 40 * 36mm / 1.57 * 1.57 * 1.42inch 1515A Size: Approx. 20 * 20 * 14mm / 0.79 * 0.79 * 0.55inch Quantity: 4pcs Type: Corner Brackets Package List: 4 * Corner Bracket