Arbors come with 1/4" high-speed pilot bits
Designed to make the removal of material from within the hole saw much easier. Simply push the two drive pins of the arbor through the two holes in the bottom of the hole saw, and the material is forced from the hole saw
CAUTION: Any cutting tool may break or shatter under improper use. Government regulations require use of safety glasses and other appropriate safety equipment at all times in the vicinity of use.