Dremel SC409 Thin Cutting Wheel Discs Pack 5 Multi Tool Accessories Speedclic

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. Reinforced with fiberglass for increased durability. The SC409 wheels have a thickness of just 0.75 mm for even thinner cuts.

eBay