Covell Signature Line Dolly Blocks are high quality, made in the USA products. These body dollies were specified by master metalworker Ron Covell and are his favorite designs from over 50 years of metalshaping experience. Drop forged from high carbon steel, heat treated, tempered and polished, they are built to last for years to come in the most demanding environments. This dolly is specifically designed for use on low crown panels. The angles of the sides are less than 90 degrees which allow it to reach into the corner of a flanged edge.