The NRG Gen2.0 Quick Release includes many features that conventional quick release systems do not offer including specially designed raised sections to prevent the hub from stretches ball-lock system for reliability a self locking mechanism for ease of use and safety functions and as always a variety of different colors and color combinations. Made from highest quality aircraft aluminum or powder-coated stainless steel for maximum durability these units are meant to last remain stylish as well as have functional usage.COLOR : Black Body with Chrome Ring.