Stans Incredible Dart Tubeless Repair Tool - Handlebar MountStans No Tubes Incredible Dart Tubeless Repair Tool Handlebar Mount. The Stans Incredible Handlebar Mount conveniently stores the DART tool for easy access whether in a pocket or backpack. With a quick spring loaded arm it deploys the DART head to create a permanent mechanical and chemical seal for large holes or tears in bicycle tires. Dart tool sold separately Conveniently stores the Dart tool on the handlebar or in a pocket backpack for easy access