1/4 in. hex collet for fast and convenient bit changes 2-speed gearbox (200/400 RPM) (no load speed) for a wide range of applications 16 Torque/Clutch Settings Built-In LED Work Light Removeable Lithium-Ion Battery for Longer Run Time - Holds Its Charge up to 18 Months in Storage Includes: Battery Pack, Charger, (4) Quick-Change Hex-Shank Drill Bits, and (4) Screwdriver Bits