Got a leaking or damaged valve stem on your tire? This AME Quick Valve Change (QVC) tool lets you replace it in about 10 seconds without even taking the tire off the rim! It's a simple, clever tool designed specifically for standard .453-inch diameter valve stems (the most common size for cars, motorcycles, and many trailers). You just screw it onto the old valve stem from the outside, push it in, and it grabs and removes the old valve core and stem in one motion. Then you can insert a new one just as easily. It's a huge time-saver compared to breaking the bead and prying the old stem out. A must-have tool for any home mechanic, auto shop, or tire service professional. Keep one in your toolbox – it'll pay for itself the first time you have a slow leak from a bad valve.