If you want to open the box, assemble and weld. The product is not for you. If you like trial and error and do a lot of welding, you might like this for the money. First you'll have to ditch the included wire and get yourself a Lincoln .030 or go to your local welding shop and grab the 2 pound spool of wire. Once you admit what kind of car you have, be prepared to be followed like you bought fake boobs for your brother, but trust me you'll be thankful you bought good wire. Now for the hard part. There is no diagram on the machine to give you an idea of how to set the parameters. User manual for another machine on another continent. or maybe another planet. If you have all kinds of time then this may be acceptable for you. If you have a kid that expects you to have a decent weld on their kart that will last longer than a cop ride. Puppy, you and he will be deeply disappointed, and your neighbors' views of the new vocabulary you taught the kids waiting in line to go kart will make you feel ashamed enough to join a cheerleading squad. The bottom line is, if you're learning, need some average parameter statements, and don't have time to mess with unsafe welds, then this HitBox becomes a KickBox and you better be learning beatboxing.