
I disassembled my Harbor Freight sandblasting booth and didn't want to mess with thousands of little nuts and washers making assembly difficult so I bought these to fit the M4, M5 and to replace M6 used everywhere. I went ahead and bought some M5 and M6 stainless steel rivets. The M4 mandrel broke on its first stainless steel rivet. I suspect he barely had the strength to fully compress the Galvanized. I'm waiting for a replacement to finish building the cabinet as I've already drilled a few holes. The M5 mandrel appeared to have a low thread profile and would sometimes thread slip on the rivets. Because of this, I had to drill out and replace four of them. After the first slip, I had to screw the remaining nuts onto the mandrel with pliers. M6 and larger spikes seem strong enough. I invented a few bonus uses for the tool to try on other things including a couple of wheels and a radiator mount on a Nissan truck I own, alongside some hard-to-reach mismatched SAE mounts. The riveter itself is great and the revain more than made up for the bad spikes. I have some doubts about smaller mandrels but it looks like Astro Pneumatic 1442 mandrels will work and can provide better quality in smaller sizes if needed. Thing is, the kit still has a lot of value here, even with some bad thorns. For the same money spent elsewhere, you only get a fraction of the features.

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