This 2.25" button section includes American standard compatible 2-1/4 (2.25) inch button supplies. These blank button pin supplies will work with ButtonMakers ProMaker, MultiMaker 4000 machines, as well as Tecre and USA buttons brands. They DO NOT work with Badge-A-Minit machine. If you are not sure what machine you have. You can check our Parts Compatibility page or contact us.