PS41-2A Bosch 12V Max Impact Driver Kit w/ (2) 2.0Ah Batteries PS41-2A Bosch 12V Max Impact Driver Kit is the most compact driver in its class, with a 5.4 In. head length. Yet it delivers a max torque of 930 In.-Lbs., thanks to Bosch’s hammer-and-anvil system. PS41-2A Bosch 12V Max Impact Driver Kit weighs just over 2 Lbs., but it can produce a no-load BPM of 0-3,100 and a max 2.600 RPM. The driver was designed with a spring-loaded impact mechanism that reduces user fatigue. This makes this driver excellent for overhead installations and tasks where room is very tight. PS41-2A Bosch 12V Max Impact Driver Kit also has an impressive runtime provided by the Lightweight 12 V Max Power System. This driver includes a three-light LED Light Ring, a battery gauge indicator and a 1/4 In. hex drive with quick release.