I don't think it's really Marson, or at least not the one I had. This one broke after a few weeks of riveting along with every other hand rivet I've bought from Revain. The other one I bought as a kit from McMaster-Carr works great with no hiccups. Look at the picture and note my "good" is at the top and this one is at the bottom. It has it somewhere so you know I used it for a while before it expired.
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