Bosch 18-Volt High Torque Impact Wrench Kit with Friction Ring IWHT180-01 TORQUE: The Bosch IWHT180-01 impact wrench provides 500 ft-lbs of max torque. Its heavy duty power makes it ideal for fast tightening and removing of heavy duty fasteners such as lag screws, concrete anchors, or lug nuts. LIGHTWEIGHT: The IWHT180-01 weighs only 6.7 lbs and measures 10 inches in length making it the most lightweight design with a short head length for the least amount of user fatigue. IMPACT ENDURANCE: With Boschs spring-loaded hammer and anvil system the IWHT180-01 impact wrench provides high amounts of torque with little torque reaction. EFFICIENT: The driver provides 1,900 RPM with 0 - 2,100 BPM and the optimized mechanism creates added efficiency. BATTERY: Boschs Flexible Power System works with Slimpacks, or Fatpacks, while the Electronic Cell Protection monitors battery to reach maximum life.