I *really* like this pump. I seriously considered buying this as it's relatively expensive compared to many other tire pumps, but I'm very glad I did. It is very well built and the cartridge mechanism is superb. I have quite a few pieces of equipment including backhoes, tractors etc and this compressor greatly reduces the amount of twisting and twisting required to keep everything inflated and running. If you work with heavy equipment at all, it will improve your life. buy today Serious. It's much more comfortable than kneeling for ten minutes pumping up construction tires.