High-strength split one-piece machined 2-gear 14/19T pinion gear module from tough 7075 T6 aluminum and particularly hard coated for superior strength, light-weight, and high durability. Developed on a specific gear device, all pinions work ultra-precise enamel shaping and ultra-true operating for vibration-free procedure. Fine inside threading enables effortless installation. Each pinion is fine etched using the tooth volume for fast & effortless recognition.