The Uni-Clamp Stud puller from H&S Autoshot is an ingenious tool for removing dents and creases quickly and easily. This tool lets you progressively pull a dent evenly by locking on to multiple stud pins using a series set screws. Pull the lowest pins first until and keep repeating the process until the dent or crease is completely returned to its original form. So simple its ingenious, no more welding flat bars to uneven surfaces, no more hammer & dollying after you pulled.