SIZE: SPART Upgrade Olympic weight plates can apply to all the 2 inch Olympic bars. We have 2.5lb, 5lb, 10lb, 25lb, 35lb, 45lb and different combinations.You can choose what you want! FEATURE: SPART weight plates have a solid iron core and slide rubber surface. This design can protect the floor from damage and ensure enough weight when you do exercise. The strong steel ring insert can help you assembly the barbell easily. The three holes are designed for grip according to your hands and you can do weightlifting exercise with single plate as well.