These weight plate storage mounts fit the vertical racks perfectly. They are secure once attached and are not going anywhere. My only issues might be the fact that due to how they are mounted, you cannot have the actual mount on the highest hole on the rack due to the way they attach and the highest hole being needed for one of the bolts (so the mount rests at the second hole from the top) Also, if you have your rack in a "nook" or otherwise tighter space, the weight plates do make getting the dumbbells off a bit more difficult, but nothing that one can't eventually get used to. Lastly, the included directions say that there should have been a wrench included in with the mounts and the bolts/nuts/washers, but I did not have a wrench in the box. That stated, there is nothing "strange" about the bolts or nuts, so the availability of a basic tool kit worked fine.