Yes I hope I can describe it where you understand. You put both ends on the panel you are welding and push it against what you are welding to. Then you push the button that is on the one handle. At that time they both weld through from the panel you are pushing from to the panel below it. They are great for doing any restoration work to make it like factory and I believe the only one you can use where you cannot access the rear of the piece you are welding to. Or you could push one end somewhere on the body and one on the tag push the button and be done if you only want one spot weld on the tag. Be sure to play with it first and get the timer set correct so you dont burn through the tag.