Dolly (tool)

A 'dolly' is the name given to a category of tools used in shaping sheet metal. In general, a dolly is a solid piece of metal, small enough to hold in one hand, with a curved or shaped face. Generally a dolly will have more than one surface, each with its own radius of curvature (much like a three-dimensional French curve), allowing the craftsman more flexibility in using the tool.

A dolly can be used either as a Hammer, shaping the metal to match the curve of the dolly, or as small anvil to provide a curved surface over which to dome or dish metal. They are commonly used to shape sheet metal in auto repair, especially in locations where it is difficult to swing a hammer.

They can also be used as backers for upsetting metal. When used as a portable anvil, a dolly can be used to hold a Rivet in position while it is being clenched with a "snapper". Such dollies are commonly cylindrical in shape, and rely on mass to work. The act of using it is known as holding up or holding on.