Shaping Sheet Metal with Shrinker/Stretchers and Hammerforms

Discover the basics of using shrinker/stretchers and hammerforms when shaping sheet metal.

Sheet Metal 109-A
The jaws of the manual shrinker are on the left and stretcher jaws are on the right. In both cases, the wedge construction forces the serrated jaws to move the metal in the appropriate direction.
Photo Courtesy Motorbooks