I returned the other two Greenlee pickups separately because I wasn't paying attention when reading the description of the hole saw. The description of the hole saw shows the corresponding part numbers of the mandrel that can be installed with the hole in the saw. I wasted my time and nearly $12 shipping it back. Are we in a hurry? Take notes as you try to record details. This Greenlee holder is amazing and designed to work with a variety of bi-metal hole saw diameters. .