The Lenox Tools 1779802 3L Arbor with 3 1/4-Inch Pilot Drill Bit for Hole Saws 1-1/4-Inch - 6-Inch is a durable, long lasting arbor that works with most hole saws. The 3L Arbor Simply allows you to screw the hole saw onto the arbor, slide up the drive pins and lock it in. The arbor also allows for you to replace the pilot bits through the use of a hex key and a set screw.