Milwaukee 49-22-0135, 4 piece self-feed bit kit includes 1-3/8 inch, 1-1/2 inch 2-1/8 inch and 2-9/16 inch for the Contractor's big hole drilling needs
This kit also includes the 5-1/2 inch coupling extension in an impact resistant carrying case
Replacement "Case Only" is sold as part number 48-55-0886