 The act of pressing or clamping can also leave brinell marks, especially if the vise or press has serrated jaws or roughened surfaces.Flat pressing plates are often used in the pressing of bearings, while soft copper, brass, or aluminum jaw covers are often used in vises to help avoid brinell marks from being forced into the workpiece.A similar-looking kind of damage is called false brinelling and is caused by fretting wear.