Component Quantity Typical Sizes (Imperial) Hole Saws (Cutter Cups) 6 to 8 $\mathbf{7/8″, 1-1/8″, 1-3/8″, 1-3/4″, 2″, 2-1/2″}$ (Common electrician sizes) or $\mathbf{1″, 1-1/4″, 1-1/2″, 1-3/4″, 2″, 2-1/8″, 2-1/4″, 2-1/2″}$ Arbors/Mandrels 2 These are the shafts that connect the hole saw to your drill, usually one for small sizes and one for large. Pilot Drill Bits 2 (or 1 pilot bit 1 Allen key/case) A small bit that goes through the center of the arbor to keep the saw centered and prevent walking. hole saw set
