I have a 12 volt pump I got from Harbor Freight, but I needed a jet that worked quickly and didn't have to be manually held on the stem valve. . The thing works great. I just open my jaws, put it on the tire valve and let go. When I'm done inflating I just open my jaws and take it out. In addition, the materials used and the design are top-notch. No complaints, just what I needed.