The Milwaukee M12 Fuel 1/2" drill/driver is the most powerful subcompact drill driver， the most compact in size， and provides the fastest speed under load. Milwaukee Powerstate brushless motor delivers the most power for the capability to perform the widest variety of applications in high speed for unrivaled subcompact performance. At only 5.9" in length， this portable drill is the shortest solution in class offering most access into tight spaces. The Milwaukee Redlink Plus intelligence delivers top-of-the-line thermal performance to give users the fastest speed under load in order to drill and drive faster than any other subcompact drill. Using Milwaukee M12 Redlithium 2.0ah compact and 4.0ah extended capacity battery packs will deliver more work per charge and more work over the life of the pack than competitive batteries. This all-metal 1/2" chuck and all-metal gearcase deliver best-in-class durability. The mechanical clutch delivers consistent torque for driving fasteners. Milwaukee M12 Fuel 1/2" drill driver is part of the M12 system which is fully compatible with over 125 solutions.