If you buy it get a shrinking bit. Eastwood sells one. If you have ever had a body panel the was hit hard you know the metal stretches pretty bad. It has the same effect as a tin can.The bit installs in the end of the gun and heats and shrinks the metal back into shape,you can actually see the metal pop back. It is only like 15 dollars for the bit but once you see the results you will be amazed.