seen those many times.
also have seen those with a little tIt in the middle of them as a tamper proof screw.
super cheap tamper proof bit sets on amazon and the bag. everyone should have them.

such as : https://www.ebay.com/itm/404091018520?

and : https://www.amazon.com/10048A-Secur...of+bit+set&qid=1703197569&sr=8-6

and many more like them in a ton of price ranges.