The 4th generation Quick Release, featuring ergonomic paddle extensions that offer the best possible leverage on the release mechanism. features many options that conventional ball-locking quick release system do not. The Generation 4.0 is specially engineered with raised sections to prevent the scratching and stretching of the hub while a self locking feature adds increased safety and functionality. Each unit is made from the highest quality aircraft grade aluminum and is anodized for maximum durability and finish.