To start with - we were not professional “tin knockers” - as in running a sheet metal fabrication shop. I had an interest in a metal and pipe fabrication shop, a plumbing business, a cabinet and woodworking business and a remodeling/general contracting business.
In recent years Malco Products certainly seems to have become a bit of a major player in providing siding, sheet metal, HVAC and fence tools. They also have some relationship with Edma - a French maker of related tools. Of course - more recently Milwaukee and their rival Dewalt have been applying their name to things like snips,
Looking at an old tool inventory, we seemed to have had a mix of related tools from Malco, Midwest (including some with the Craftsman brand) and Wiss (USA-made) plus a smattering of tools from Stortz and Stubai.
To be honest, I don’t recall much feedback from the “troops.” For siding and things like gutter and downspout tools we seemed to have mostly Malco tools with a few from Klenk.