Crumb bumpers are the lowest tier of bumper plates. The 45s and 35s do alright by the 10s and sometimes 25s don't hold up as well to abuse.

It's a kettlebell. Most of them are the same. Bought from a local reseller in the heat of covid for a fairly good price.

If you have crap J cups these are a must to protect you bar. Easy to install and save the knurling on your bar. They pretty durable to. I smashed the bar into mine and while it cracked it's still hanging on.

I highly recommend these for protecting your bar from you safeties. The one for my Titan T3 safeties fit perfectly.

These are a neat piece but also by the best option for loadable dumbells. They're pretty good quality. They're no more difficult to load than other loadable dumbell. My major issue is you can't get them tight. You're stuck with wherever the collar locks closest to the plates leaving them a little loose.

The go to plates of Massenomics gym. One day I'll own a set.

I have the even cheaper grey cast iron ones. They're plates and they weigh something but haven't checked their accuracy. Also don't think they're too durable.

Slightly better option over using a plate. Prior to the Kleva jacks coming out these were your only option for travel. It works but not the best option.