Bosch IDS181-102 18-volt 1/4-Inch Hex Compact Tough Impact Driver with Slim Pack Battery Most Compact Impactor Design with a Head Length of 5.4 inches - Allows the tool to be used in small, tight and hard to reach places Provides the best runtime and control for small to medium duty fastening jobs, optimized torque limits stripping of screws and shearing off the head 3 LED Light Ring - Provides shadow free illumination for the best visibility in low lighting applications Designed to provide maximum impact endurance and increases tool's performance in small to medium duty fastening applications Electronic Cell Protection - Increases battery lifetime by preventing damage caused by misuse