The Stop & Go Tire Plugger allows for an on-the-spot/on-the-wheel repair to virtually any tubeless tire, sealing the puncture on the inside. The Plugger is a spring-loaded gun that drives the plug into the hole, the shaft of the plug expands under pressure to fill the puncture and the mushroom head of the plug seats on the inner wall allowing no air to escape. The entire kit weighs in under two pounds and includes the plug gun, nozzle, probe tool, reamer/rasp tool, retractable blade, 25 rubber mushroom plugs and detailed instructions. MSRP rings in at $43.95, and an extra bag of plugs is $7.50.