The product is a lot of four antique canvas stretcher metal corners made by the brand A.D.S. in the United States around 1885. These corners are designed for attaching to the back of a canvas to provide support and stability, especially when the canvas is being stretched for framing or artwork. The craftsmanship and historical significance of these metal corners make them a unique and sought-after item for art enthusiasts and collectors looking to add a vintage touch to their projects. Buyer receives four items for sale price.