Lenox 700G, General Purpose Hole Saw Kit, 10 pc Kit Includes: 7/8", 1", 1 1/4", 1 3/8", 1 1/2", 1 3/4", 2 1/8", Arbors 5L and 6L, Pilot Drill 56PD Features: *Bi-Metal Speed Slot Hole Saw Kit *New, patented hole saw design keeps Lenox ahead of the competition *Shatter Resistant *Patented variable tooth set and height ensure that each tooth works independently, with super efficiency *Lenox's unique tooth shape evenly distributes cutting force over a wider area of the tooth *Virtually indestructible, they will cut faster and cleaner and last longer than other hole saws