48-28-4001 Milwaukee Bit Extension 5-1/2 in.Extend your reach 5-1/2 inches when drilling with Milwaukee Selfeed Bits, Auger Bits and Hole Saws. The Quick Change shank is 7/16 inch hex. The 7/16 inch hex fits both 3 jawed chucks, 1/2 inch drill capacity and larger, as well as 7/16 inch Quick Change chucks. Features:7/16 in. hex shank5-1/2 in. lengthFor selfeed bits, auger bits and hole saw 1 in. diameter and larger with 7/16 in. shank Includes:(1) Bit Extension 5-1/2 in.