Bosch's ADS181B 18 V cordless Lithium-Ion 1/2 In. Right angle drill driver has best-in-class chuck capacity. Featuring a 1/2 In. ratcheting chuck. This provides maximum range of applications from drilling to driving. Superior motor provides up 60% more torque. This increasing performance in drilling applications, longer life and higher stall torque. An ergonomic slim, soft grip provides maximum comfort and control in drill and driving applications and the compact head length makes the ADS181B ideal for working in tight spaces.