This handy 3 piece set turns a tough job into a simple one these tools allow you to repair dented or damaged tail pipes and exhaust pipes with minimum effort and fuss simply insert the tool inside the object in need of repair and turn the long hex bar to expand the tool inside the pipe which in turn straightens out the damaged pipe manufactured from rugged steel alloy these tools can be used again and again and are suitable for pipes of various dimensions a great time and effort saving set