The Milwaukee arbor with a 3/8″ hex shank is designed for enhanced gripping capability in the chuck, making it suitable for use in 3/8 in. capacity drills and larger. The arbor features a 1/2 – 20 thread and is compatible with hole saws ranging from 9/16″ to 1-3/16″. Additionally, this arbor can be used with the supplied pilot bit, which is specifically designed for use on both wood and metal surfaces. This combination of a durable arbor with a compatible pilot bit provides versatility and convenience for your drilling applications.