The slide hammer process is as follows -
You have to clean the area you are going to use by grinding.
You then take a copper rivet / nail which goes into a gun.
You then squeeze the lever which then attaches (welds) the rivet / nail to the metal.
You then attach the slide hammer by sliding it over the end of the rivet / nail and turning to fix it on.
The slide hammer is about 3 foot long and has a grip at the top and a metal weight that slides up and down.
You then gentle slide the weight up and bang, bang, bang it pulls out the dent.
They are great but do not get dents out of awkward places and also dents that have a crease will rarely work this way.
You then usually twist off the rivet / nail and can then file / grind back.
Then you of course need to chrome / paint etc.
http://www.htpweld.com/products/auto_body_tools/Hope this helps
greentoad