A6-5 Kwik Change Arbor Kit with Carbide Tipped Drill contains: - A6 Kwik Change Chuck with Hex Shank - One A6-2 Arbor for 9/16" - 1-3/16" (14-30mm) dia. Hole Saws - One A6-3 Arbor for 1-1/4" - 6" (32-152mm) dia. Hole Saws - One XA015C Carbide Tipped Pilot Drill