Neiko 00822A Bi-Metal Hole Saw Kit with Speed Slot, 18 Piece Multi-Size Sharp, optimized tooth design penetrates sheet metal with precision, accuracy and ease Bi-metal design construction is thick and cuts metal fast while upholding toughness for maximize long life Double slits staircase design on each side of saw provides clearance and access to quick slug removal preventing chip buildup Wide range of commonly used hole saw includes: 3/4", 7/8", 1-1/8", 1-1/4", 1-3/8", 1-1/2", 1-3/4", 2", 2-1/4", 2-1/2", 3", 3-1/4" along with 2 arbors, 2 drills, and 1 extension shank Heavy duty, ABS carrying case is lightweight and durable for easy storage and is portable for all job environments