Cool, but.... How often do you need to pull a large dent from a FLAT area of sheet metal? Using the draw bar puller through all of these "keys" only allows you to pull a straight line. A stud puller allows you to pull a dented panel back to the proper contour. Little by little. While it's kinda cool that you can snap them all off at the end of the job and have very little cleanup... It looks like a tedious process and snapping them off strategically to pull a contour would be no simpler or faster than using a stud welder and slide hammer. Just my humble opinion.