From the Manufacturer
MK Morse Cobalt Bi-Metal Hole Saw Maintenance Kit. A handy general purpose kit for plumbing and electrical jobs on pipe and conduit through 2″. Saws (1 each): 3/4″, 7/8″, 1-1/8″, 1-3/8″, 1-1/2″, 1-3/4″, 2″, 2-1/4″, 2-1/2″, Arbors (1 each): M24K, M44, M45P, Extension (1): 12″
Hole Saw Kits Type: Maintenance Kit Number of Pieces: 9 Size Range: 3/4 – 2-1/2 Material: Bi-Metal