The Racer Pro Tire Plug Tool carries twice the plugs of its predecessor for almost no added weight. Twin Tube(TM) technology loads 4 plugs into one compact tool at 26 grams, just 2 grams heavier than the standard Racer. Snap-on caps secured with an O-ring keep each plug clean until it's needed, and popping one off deploys either a standard plug or a Megaplug for bigger damage. Once one tube runs dry, unthreading and flipping it brings 2 more plugs online. What Our Gearhead(R) Experts Are Saying:"I popped the cap, pushed the plug in, and was back on the trail before my riding buddy finished asking if I needed help. Having a Megaplug loaded right next to the standard one meant I didn't have to guess which tube to grab."