I recently got an air compressor to inflate my own tires so I needed a tool for that. It fits, I prefer flex heads, and a built in pressure gauge saves me the hassle of switching back and forth between this and another tire gauge. It comes with a variety of connectors that can be used with almost any size plug, but I only needed 1/4 inch. No tape or sealant is supplied, so you will need to purchase some of these. The included pocket blowgun is a nice touch.