Stans Original Dart Tubeless Repair Tool. Dual Action Repair for Tubeless (DART) repairs large punctures and slices in tubeless tires faster easier and more reliably than existing tire plugs. Unlike traditional tire plugs that attempt to press rubber strips into a puncture dual action DARTs create both a mechanical and a chemical seal. The DART anchors into a puncture while creating a simple and safe chemical reaction with your Stans sealant to quickly form a permanent airtight bond. The DARTs patent pending ability to react with latex sealant makes tubeless tire repair fast easy and reliable for every rider.