Specifications: 20 x20mm Thickness: about 2.0mm Aperture: about 4.3mm 【20pcs Corner Brackets】You will receive 20pcs black support corner brackets. The size of the corner bracket is 20 x 20mm / 0.78 x 0.78inch. 【High Quality】These L-shaped right angle corner braces are made of premium stainless steel. They are waterproof, rust-resistant, and don't worry about daily scratches, corrosion and tarnishing. 【Safe Design】Oval design to prevent scratches. Counterbore design, more beautiful after installing screws. The surface of the corner bracket is brushed, no burrs, avoid sticking hands. 【Creating More Space】Right angle brackets can be fixed at the four corners of the extra space, and then partitions or storage boxes can be placed and fixed. 【Wide Application】Works great for book shelves, potted plants, stereo, table, desk; reinforce a broom closet door, flat surface joints, seams and cracks. Help reinforce your bed frame, box, building or repairing installed furniture. Note: This product