I show you a quick demonstration of my Dremel rotary tool (old Model 800, 10.8V lithium, 35,000RPM). I use the Dremel tool with a cutoff wheel to cut into metal. You can find cordless lithium battery Dremel tools at Amazon: https://amzn.to/2soGLq1
In this video I cut into a metal chain link and an aluminum pc computer case for modding purposes. I use cut-off wheel part #426. It’s reinforced with fiberglass for increased durability and used for cutting metal including hardened steel. Cut off wheels make it easy to cut bolts or screws or make slots in rusted or stripped bolts and screws for removal with a screwdriver.
Ideal for cutting, grooving and trimming all kinds of metal. May also be used on other materials including thin wood, plastics and ceramics. Cut bolts or screws or make slots in rusted or stripped bolts and screws. The cut-off wheel cuts only along its edge.
User tips, plastics require very slow speeds because they tend to melt at the contact point. Wood requires low speeds also.