TOOL-FREE BIT CHANGE - No Allen Key Required To Change LENOX Pilot Bit (Only applies to LENOX Pilot Drills) SNAP-BACK 2-STEP RELEASE - Step 1) Unlock Hole Saw, Step 2) Unlock Pilot Bit ANTI-JAM COLLAR - Reinforced Collar Drives Hole Saw Without Jamming Or Disengaging UNIVERSAL HOLE SAW COMPATIBILITY - Accepts All Threaded Hole Saws, No Adapters Required - For the Range of Diameters Listed On Packaging SINGLE-HANDED OPERATION - Collar Snaps Back and Stays In Position While Changing Bits