DEWALT DW1810 3/8-Inch Quick Change Mandrel (9/16-Inch to 1-3/16-Inch ) DW1810 offers tool-free quick-release collar to prevent hole saws from locking to the mandrel DW1803 and DW1805 offer spring-loaded collar that automatically engages drive pins All quick change mandrels feature double set screws with a recessed combination head All quick change mandrels have been tested through 15,000+ cycles to deliver jobsite durability Pilot bits feature the patented DEWALT Pilot Point Tip for faster material penetration