Shearing is the process of cutting metal to size out of a larger stock such as roll or flat stock. Shearing produces a shear edge burr, which can be minimized to less than 10% of the material thickness. During the process, an upper blade and a lower blade are forced past each other with the space between them determined by a required offset. Normally, there is one blade that remains stationary. Commonly sheared materials are mild steel, stainless steel, bronze, aluminum and brass.