These work perfectly. If used with a long bolt and an overkill nut (or any other nut) you've got a mag-pin with the option to tighten it down on loose fitting attachments. The heads are small enough not to interfere with adjacent rack holes.
Exactly what I was looking for to hold my Rogue Mace and EZ curl bar. I was looking to store both bars in a low-profile way on my Rep Modular Storage shelf upright, and The Vault was the best solution I could find. It's highly protective with the liner against the upright and the barbell and provides a little flare with the backer color option. This is my first purchase from FrogFits and I'm impressed.
It's honestly perfect for its intended purpose. Well-constructed, only requires a single bolt for mounting, protects from metal on metal contact, all at an excellent price point! Also, looks great!