The LENOX SNAP-BACK 3/8 Inch Quick Change Hole Saw Arbors Feature Tool-Free Saw and Pilot Bit Change For Productivity. The 2-Step Design Releases The Saw And Pilot Bit Without Requiring Additional Tools. The Collar Snaps Into Each Position, to Allow For Single-Handed Operation, and Is Reinforced To Stay Engaged While Drilling. LENOX SNAP-BACK Quick Change Arbors Are Universally Compatible With All Threaded Hole Saws And Do Not Require Adapters For Use. (Only applies to LENOX Pilot Drills) - For the Range of Diameters Listed On Packaging.