Halex 1/2 In. Knockout Seal (4-Pack) is designed to provide a reliable solution for covering exposed knock-out holes in steel outlet boxes and other metal enclosures. Made from durable steel, these knockout seals ensure a secure and clean finish, helping to maintain the integrity and safety of your electrical installations. I for use in a variety of applications, this 4-pack convenience and quality you can trust. Model Number: 26071