The Lincoln Electric k21851 is a small welding machine. You can move it easily. It uses electricity to work. You can plug it into a normal power plug at home. This machine helps you join metal pieces together. It is good for people who want to start welding. Everything you need to start comes with the machine. You only need to buy gas if you want to use it … [Read more...] about What is Lincoln Electric k21851 worth for you to own?