The 3M 28838 Mandrel is a high-quality tool designed for use with unitized wheels, specifically those with a 2-1/2 inch diameter and 1/4 inch thickness. Made in the United States, this mandrel is durable and reliable for metalworking processes. With the trusted 3M brand name, customers can rely on its performance and craftsmanship to ensure smooth and efficient deburring and grinding tasks.