After carefully reviewing my options, I purchased Vulcan Strength J-Hooks to fit a 3x3 (1" holes) rack that I purchased secondhand. I was well aware that these are "not guaranteed to fit any non VULCAN racks" and that there is a restocking fee for returned orders, and I decided it was worth the risk. I placed my order on 7/8/2021 (#56321, verify it). On 7/12/2021, I received an email stating: "We do not have a history of you owning a Vulcan Rack/Rig therefore we are canceling and refunding this order because the attachment will not fit your current set-up. This will avoid the lengthy return process. Our Vulcan attachments are only compatible with Vulcan Racks/Rigs." It's strange how it changed from "not guaranteed to fit" to "WILL NOT FIT your current set-up" - as if they know what my current set-up is. For all they know, my secondhand rack could be Vulcan-made. And there are other reviews which indicate that customers were able to purchase and use these and other attachments on non-Vulcan racks without Vulcan canceling their orders, so I don't know why mine was singled out. An email to ask me about my setup, or even to restate "hey, this might not fit! Are you sure you're okay with that?" would've been received and appreciated. But since this is the route they chose, I'll never purchase another Vulcan product again.