Knowledge, experience along with the proper equipment. This video will go over several of the crucial equipment a metal fabricator would have to use to finish his job.
An air compressor is the first thing you’ll require. You should get the largest air compressor you can get your hands on. It will impact the other tools you have and how you work with the tools. This is the reason it’s worth the money.
Cutoff wheels are another tool is required. It is possible to get either air-powered or electric. Electric is more affordable and more powerful, but could not function in the same way as an air powered cutoff wheel. It can be used to cut off pretty much everything.
Always have the need to add accessories to use your equipment. The tools you use will require eye- and hand protection and a variety of blades and discs to use with your cutoff wheels and saws.
A angle grinder is needed for grinding or sanding the edges of metal. For more details on equipment for fabricating metal and the best way you can use them, see the video on the link above.