5 1/4" closed. Unique tool with 23 features which include: screwdriver that can lock at 90 degrees for extra torque; LED light; liquid level; 5 ft. tape measure; alloy magnets; miniature hammer; and 16 titanium coated screwdriver bits including hex, flat, Phillips, and square. Cast aluminum body, zinc bit extender and hammer surface. Black ABS handles with rubber touch coating. Uses two lithium CR2032 - 3V batteries (included). Rugged and durable construction - can even withstand being run over by a car. Useful for a variety of everyday tasks including: tightening screws, measuring tight spaces, emergency LED, bicycle repair, hanging pictures, assembling flat packed furniture, do-it-yourself projects, and much more. Ideal for homeowners or a great gift idea for a first apartment or college student, Father's Day, Christmas, housewarming, birthdays, wedding, etc.