Crafted with hardened steel for extreme durability, Dewalt replacement pilot bits are ready for your toughest jobs. Each features an exclusive Dewalt pilot point tip for fast material penetration. DW1810 offers tool-free quick-release collar to prevent hole saws from locking to the mandrelAll quick change mandrels feature double set screws with a recessed combination head for quick and easy centering bit changesA full range of standard and quick change mandrels for versatility in a wide range of hole saw applicationsAll quick change mandrels utilize hardened steel construction and have been tested through 15,000+ cycles to deliver jobsite durabilityImproved pilot bit design gives longer life in all materials