Bosch ADS181-102 18-Volt Lithium-Ion 1/2-Inch Right Angle Drill Kit with High Capacity Battery, Charger and Case 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