An angle bracket or angle brace or angle cleat is an L-shaped fastener used to join two parts generally at a 90-degree angle. It is typically made of metal but it can also be made of wood or plastic. Angle brackets feature holes in them for screws.

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A typical example use of is a shelf bracket for mounting a shelf on a wall. In general, angle brackets have a wide range of applications, and are used, among other things, in building construction, mechanical engineering or to join two pieces of furniture

Retailers also use names like corner brace, corner bracket brace, shelf bracket, or L bracket. When the holes are enlarged for allowing adjustments, the name is angle stretcher plates or angle shrinkage.^{[citation needed]}

There are different sizes available, varying in length, width and angle.

• Shelf supports have many variations, including angle brackets