The Lonex Enhanced High Speed Gears are built out of high density, heat treated steel to maximize durability. Each gear is molded to perfection for ultimate smoothness operation, which can help relieve stress on the battery and motor, and will also decrease the noise when properly shimmed. The machining on the teeth is superb, as each gear fits into place as if they were one piece of metal. Lonex gears are some of the most solid gears available for Tokyo Marui compatible AEG gearboxes.