It works for all those canisters apparently. How to Recycle Your Fuel Canister - YouTube
I’m no expert but wouldn’t it be safe enough to just open the stove valve and release all the gas out then puncture with a sharp object, as with this tool?
Okay great, that tool looks like the answer to my problem
Also, looks more stable than using a sharp something else. I did read up that puncturing it and making sure the gas is totally released is an acceptable way for recycling these.