Bosch Bare-Tool ADS181B 18-Volt Lithium-Ion 1/2-Inch Right Angle Drill Max capacity 1/2-inch ratcheting auto lock chuck - maximum range of applications from drilling to driving High Performance motor - produces best-in-class torque to complete demanding applications Superior ergonomics - slim, soft grip for or maximum comfort and control All metal gearbox - for maximum durability and increased performance Compact head length - for drilling and driving in tight places Best in Class Chuck Capacity: 1/2-Inch Ratcheting chuck provides for a maximum range of applications from drilling to driving Superior Ergonomics: Slim, soft grip provides maximum comfort and control in drilling and driving applications Compact Head Length: Designed to provide maximum drilling in close quarter applications Integrated LED White Light System: Provides maximum illumination of work area, reducing shadows Flexible Power System: Compatible with every Bosch 18-Volt Lithium-Ion battery