Typically when a customer approaches Advanced Integrated Technologies about buying a new spot welder we recommend doing some test welds. Some welding applications are straight forward and we can recommend a welder that will do the job. But in many cases the application isn't straight forward, and we like to make sure that we are providing a welder that will give the expected results. At AIT we offer free test welds to anyone that is shopping for a new spot welder. You can find more information about spot welders by going to http://www.a-i-t.com/resistance-welding-equipment and reading about the different kinds of welders and what applications they are used for.