One of the most useful sheet metal tools is a set of Lancaster-style shrinker/stretcher found at most stores that specialize in import knock-off tools. I have owned this set for a long time and the stretcher has never worked right. I thought a set of stipple jaws would be a good start. I fell down the rabbit-hole of how they work and why this tool never worked.

Stipple Jaws: https://www.tinmantech.com/products/f...

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