To select the correct arbor, match the holesaw size and chuck size/type above, as long as the arbor is the same or smaller than your chuck size it's okay. Each arbor is supplied with a 1/4" pilot drill, spare pilot drills are available. If you want a really quick method of swapping the holesaw without removing the arbor from the power tool, see Starrett Ulti-Mate Rapid Release Arbor System.
