This has gotten me into some deep diving and I have come up with no real answer, but I did find this-
The spanner[63] or Snake-Eyes (trademarked)[64] screw drive uses two round holes
(sometimes two slots - the same driver bits work in both types) opposite each other and is designed to prevent tampering. Other informal names include pig nose, drilled head or twin hole.[65] This type is often seen in elevators and restrooms in the United States, the London Underground in the United Kingdom, some train wagons and the Montreal Metro in Montreal, Quebec, and is seen in all Panama Metro wagons. The driving tool is called a "spanner driver" or "spanner screwdriver"[66] in the US, and a "pin spanner" in the UK.[citation needed] They are also often used for soft spikes on golf shoes. The US military's M17 and M18 service pistols (variants of the SIG Sauer P320) use spanner screws to dissuade disassembly of the handgun beyond normal field maintenance except by the authorized armorer, and they had also been used previously for reinforcement screws on the M14 in order to secure the front locking tab on the magazine well.
The knife and gun manufacturer Microtech uses a variation of this with 3 round holes arranged in a triangle shape. The camera company Leica Camera has used versions of this on rewind knobs and other levers on their rangefinder cameras.
From a Wlikpedia link.
https://en.wikipedia.org/wiki/List_of_screw_drives#Spanner
