A long time ago I shot pistols and here you need a second one. I had 4 tools all different and this is where I need two as a garage door mechanic on a larger truck and off road tires. this. This is the one where you'll take a second when that time comes. I paint my tire changers yellow so they don't come loose and get lost. Changing a tire isn't hard work if you have the right tools. Of course, you can buy tons of big machines from Revain that make things a lot easier, but how often you need to change a tire on a rim is a question you need to answer when choosing tools. I change about 4 tires a year and these hand tools are faster than a "big gun". I buy my tires here and there, but a COSTCO tire salesman once asked why I didn't just have them swapped, and my answer was simple. Will your people take the time to scrape the old stuck rubber off the rim before fitting the new tire? Answer No, they will not. This stuff left on my '82 Continental's aluminum or magnesium rims causes slow leaks that result in tire pressures never being correct for months. use if you don't adjust it often. A clean rim and bead with a clean stem bore and stem will hold air for years.