From the Manufacturer
MK Morse Master Cobalt Bi-Metal Hole Saw Plumbers Kit. Contains pipe tap sizes for pipe through 2″. Saws (1 each): 3/4″, 7/8″, 1-1/8″, 1-1/2″, 1-3/4″, 2-1/4″. Arbors (1 each): M44, M45P
Hole Saw Kits Type: Plumber’s Kit Number of Pieces: 6 Size Range: 3/4 – 2-1/4 Material: Bi-Metal