The 1779805 Lenox Tools 6L Quick Change Arbor fits Lenox Hole Saws from 1-1/4 inch to 6 inch, (Sizes 20L thru 96L). It features a Hex Shank sized for use with 3/8” and larger drill chucks. The 6L Arbor includes a 1/4” pilot bit and is a durable long-lasting arbor made from hardened carbon steel for added strength and durability. It will also work with most compatible brands of hole saws. The 6L Arbor features a handy tool-free Quick Change feature with retaining pins, which help provide a secure, stable mount for larger diameter hole saws. The pilot bit is secured by a set screw and is easily removed and replaced, (part # 1779810), using an 1/8” Allen drive hex key, (hex key not included).