Milwaukee 49-56-9100 7/16-Inch Hole Saw Arbor The product is easy to use The product is durable The product is manufactured in China Tool-free operation. Universal, quick change with all brands of hole saws. No adapters required. Durable hardened steel construction. Fits all hole saws 1-1/4 in. and larger. Fits all drill chucks 1/2 in. and larger Size Range 1-1/4 in. & Larger Shank Size 7/16 in. Special Feature No-Wobble Quick Change Includes: (1) Large Quick Change Arbor, 7/16 in