Milwaukee 18" Bit Extension allows you to extend your reach by 18 inches when drilling with Milwaukee Selfeed bits, auger bits, and hole saws. It features a quick change shank with a 7/16 inch hex size, designed to fit both 3-jawed chucks with a 1/2 inch drill capacity or larger, as well as 7/16 inch quick change chucks. This bit extension is i for enhancing your drilling capabilities in a variety of applications, providing convenience and versatility on the job. Model Number: 48-28-4011