Milwaukee 7/16" Shank Large Thread Quick Change Arbor is designed to fit hole saws up to 1-1/4" and works with drill chucks 1/2" and larger. Crafted from durable hardened steel, this arbor ensures long-lasting performance and reliability for your drilling needs. Its quick change feature allows for efficient and easy swapping of hole saws, making it a practical addition to any toolkit. Model Number: 49-56-9100