Bosch CLPK234-181 18-Volt Lithium-Ion 2-Tool Combo Kit with 1/2-Inch Compact Tough Drill/Driver, Impact Driver, 2 High Capacity Batteries, Charger and Case Most compact and lightest weight drill/driver in class: Delivers better balance and control of the tool in tight areas Most compact impostor design delivers light weight, better balance and increased control Optimized impact performance: Provides the best runtime and torque control Torque control limits stripping of screws and helps prevent screw heads from shearing Electronic Cell Protection (ECP): Increases battery lifetime by preventing damage caused by misuse