In chain manufacture, outsanding metal finished products result from skilled engineering of heat treatment. In AM Cross Ring Chain series, it is adapted the world-class level of heat treatement technology to enhance chain strength and durability. In addition, newly developed grease is well-retained between solid bushing and hardened pin to achieve the best operation condition. The special cross-shaped ring stops grease to vanish over time, so lubrication lasts longer to constantly reduce friction damage. The above features lead to AM Cross Ring chain outperform the standard chain, even O-ring chain products. AM Cross Ring chain stays with you to conquer the most severe and harsh condition and enjoy every riding moment.