This is a Magnetic storage pin for change plates as well as a lighter duty loading pin. The Pictured is the prototype it has a 95LB pull magnet as the base. I do not recommend using it horizontally off the rack as pictured, when I started shaking the rack it just slides down, but moving it around on the cross bars its solid. Horizontal storage limit is about 8lb, vertical is probably higher than you can stack, loading pin is 120LB limit. Multiple colors available, if you want one not listed message me. These are 4" in length right now, I can of course print longer, so let me know if you want one like that. These are made from HIPS so they are a high Impact plastic, most people are using PLA which will melt in your home gym or warp as well as not take multiple impacts.