Milwaukee® Gear Case Assembly is designed for 0602-20 12 V 3/8" compact series driver-drill, 0612-20 14.4 V 1/2" compact driver-drill, 0612-50 14.4 V compact driver-drill, 0612-22 14.4 V 1/2" compact driver-drill and 0602-22 12 V 3/8" compact driver-drill.