Contractor's Speed Slot® Hole Saw Kit, 17 PiecesIncreased wall thickness improves durability and minimizes tooth loss Optimized tooth design penetrates metal with ease Larger, sharper teeth remove more wood for fast cutting Speed Slot staircase design for fast, easy plug ejection Includes hole saw sizes: 5 8", 3 4", 7 8", 1", 1 1 8", 1 1 4", 1 3 8", 1 1 2", 1 3 4", 2", 2 1 2", 3" Includes arbors: Standard 1L, 2L (1 2" Shank), Three pilot drills No. of Pieces: 17 Manufacturer Part Number: 308201200G