The Job Saver Hole Saw kit includes the 5 most popular Hole Saw sizes, an arbor, a spacer and an adapter in an impact resistant plastic carrying case. Hole Saw sizes include 7/8 inch, 1 inch, 1-1/8 inch, 1-1/4 inch, 1-1/2 inch. The spacer and adapter allow the 1/4 inch shank arbor to be used on Hole Saws up to 1-1/2 inch. This handy kit covers most everyday hole drilling needs. Hole Saws have the 4/6 teeth per inch design for more efficient chip clearance and less heat build up. Carrying Case is also sold separately as 48-55-0782.”