Yes. I know. Maybe you already have a mightier EDC knife. But do you want to get your main knife dirty? For sticky situations such as quick packages, letters, oily food packing opening, there is this keychain knife.
This is a very useful knife, literally. The lockable keyring allows this equipment to be hanged with your keys and really follow you wherever you go.
If you are introducing the knife culture for your loved ones, this is a good start. Plus they can use it during an emergency to cut things such as seat belts. Not everyone can flick open a folder as quickly as you!