The Milwaukee 14-30-2669 Impact Driver Gearcase Assembly transfers power from the motor to the driver mechanism for proper impact tool operation. The gearcase houses and supports the internal gears that transmit rotational force and torque to the output section during fastening applications. This replacement assembly is designed for compatible Milwaukee impact drivers and can be used ... https://www.wholetoolbox.com/milwaukee-14-30-2669-impact-driver-gearcase-assembly/14-30-2669.html