This ring cutter from American Diagnostic Corporation is the tool to use for removing rings from swollen fingers. We can almost hear the Toolmongers mutter something about a Dremel with a cutoff wheel as they read this — but remember, when you’re an emergency worker you want to make the situation better, not cause more damage.
The tool’s safety lever slides under the ring to protect the finger from the razor-sharp serrated saw. You hold onto the chrome handle and twist the large thumbscrew with the other hand to cut through the ring.
This tool probably won’t be in the average Joe’s toolbox — it’s intended for medical professionals, police, and firefighters — but if you still want one, pricing starts at $20.