Bosch Impact Wrenches feature Innovative Impactor™ Fastener Driver technology. The Impactor's innovative Hammer & Anvil System produces twice the torque of the gear driven systems found in standard drill drivers, delivering up to 1,350 inch-pounds of torque. The hammer, driven by the Impactor's powerful motor, connects to the anvil, with strikers resting between the striking surface. When the hammer rotates, the strikers impact the lugs of the anvil and turn the HEX chuck at the opposite end of the anvil. The result is category-best BPM, RPM, and torque.