Dual Action Repair for Tubeless, DART is the solution to fix damaged tubeless tires faster, easier and better Updated with stainless steel insertion rod Bonds with liquid sealant on the inside of a tubeless tire to form both a chemical and mechanical seal to permanently bond a puncture too large for tubeless sealant to repair on its ownd Repairs punctures and slices too large for sealant alone to seal Woven, laser-cut material easily conforms to nonuniform punctures shapes Base of tool features molded Presta core tool for sealant top-offs Includes 2 DART's