Comment by Daniel_sk

Check out the Victorinox Signature Lite - it’s a very small keychain knife with a blade, scissors, pen (!), led light, nail file and screwdriver. It’s not longer than a regular door key and very light. You won’t even notice you are carrying it. I have had it with my keys for 10 years. https://www.victorinox.com/global/en/Products/Swiss-Army-Kni...