[Plastic Corner Brackets] : The package comes with 20Pcs of black mending brace in 42mm/ 1.65" length, 20mm/ 0.79" width, 20mm/ 0.79" height, 4 holes. [Sturdy & Durable] : Constructed with plastic material, these shelf cabinet braces are of strong durability, non-conductive, not easy to deform, and have good stability and support. [Feature] : The mending plate adopts right angle design, which has a large contact area and can bear weight. They can maximizes reinforce the stability of the edge of the furniture and the furniture will be enhance and not easily get loose. [Good Choice] : Good repairing and mending tools for use on various occasions and strengthen the right-angle joint. Can be used in most wooden furniture, like window, screens, chests, beds, chairs, desks, cabinets, drawers, shelves, and so on. [Notice] : They are easy to install with screws (Not Included.). Allowing 0.1-0.5mm differs due to manual measurement. Please check the sizes before buying.