L-brackets, also known as angle brackets, are metal brackets shaped like the letter "L." They are commonly used in construction and woodworking to provide support and stability to structures, such as shelves, furniture, and frames. By connecting two surfaces at a right angle, L-brackets help distribute weight and prevent sagging. These brackets come in various sizes and materials, including steel, aluminum, and plastic. They are typically installed using screws or bolts, making them easy to use for both professionals and DIY enthusiasts. L-brackets are essential for ensuring the durability and strength of many projects.