I started working at my current company in 1999. It took them a couple days after my start date to get me an electroic swipe card to get in and out of the building. The short-term solution: a paper card with the signature from the head of HR authorizing me to get into the building and onto my floor, as nobody recognized me yet.

I still have it. I do not know why but it’s been with me ever since, moving from wallet to wallet.

There’s not a lock, but you can adjust the tension on the thumb slide and thus cause the slide to require more force to open. There’s a video on how to do that here: https://www.youtube.com/watch?v=aQ-atBnbQ7k

I don’t think it will open on its own in your pocket, but if you left-pocket carry, I can certainly see it opening accidentally when you’re putting something _into _ your pocket.

The Victorinox tweezers are… very low quality compared to other offerings. I’ve been using an ALOX Farmer X for a couple years now and I never miss the toothpick or the tweezers. YMMV of course.