Standard Weight Trees work with weights with a 1 inch hole. We offer a wide variety of racks to help get those plates off the floor and organized for use. If you are tired of picking weights off the floor, or stubbing your toe on plates laying around you need a Standard Weight Tree. Most of our racks will hold Standard or Olympic plates so if you have a mix you probably need to go with a Standard instead of Olympic Weight Tree. At Fitness Destination we offer free shipping to the contiguous US.