Duotone bars are the most advanced in the market, offering the original and improved designs like the safest quick release system the "Iron Heart", the 5th Line adaptability and most recent and most game changer of all the De-power Click system. For Duotone 2019 bars do not include the quick release, you now have the option of choosing between different types of quick releases bases on the style of riding. There is one for free ride, one for freestyle and one compatible for rope harness. Take a look don't forget to ask if you have any questions