Forged and hardened steel crimping head is specially designed to roll the steel flanges over with a minimum of physical effort and leaves the flange smooth without unsightly ripples. Design allows tool to maneuver around inner and outer curves as well as most body design features. Close tolerance design and manufacturing, results in a tool that is incredibly smooth, quiet, and easy to use. Drastic reduction in the time required to install a door skin can be expected to improve as much as an hour or more. One handed operation to allow for free hand to manipulate the work place. Variable flange thickness adjustment allows for accurate dispersement of panel adhesive in the crimped area resulting in a smooth glue bead. Drastic improvement in the quality of the finished product. The finished cr.