This is a Fractional/change plate holder for power racks, it is not designed to hold over 25lb of weight, so your lighter plates are great stored high up out of the way. Two weight pegs measuring 3" in length, and are default for Olympic plates though I can make them for standard weight plates. Its secured to the post with a 5/8" or M16 bolt(if you want to use a 1" bolt there is a version for that as well) that you will need to source yourself, and has a peg you insert running down the side of the post to stop it from tilting from being loaded heavier one one side or another( can be set for 2" or 3" wide racks).