I replaced all of my hitch pins with these. The embedded magnets are strong enough to stay in place but can be taken off easily. The flat surface is a great spot for some customization.
These ab straps are definitely over built and will last a lifetime. They hook up easily to a pull up bar with an carabiner and support your arms well during use.
This blob trainer is really cool. I have average size hands and just using the unloaded trainer is a challenge. Definitely one of the coolest pieces in my gym