The Burley Walk 'n Roller Kit accessory package is designed to easily convert any Burley kid trailer into a stable, sturdy stroller. All you need to do is Unhitch the trailer and turn the knob to lower the wheel. The low tongue weight and long stroller wheelbase make steering and handling almost effortless. Once the Walk 'n Roller Kit is installed, it is always ready to go. No tools or additional parts are required to use your trailer as a stroller. So, you can ride to the festival, park or beach