What is the tool called that is used to adjust focus lens of laser pointer pens?

It is an odd looking tool I'd imagine. The lens has two cylindrical indentions on opposite sides of the lens screw. I would think the tool needed would look like a screwdriver but on the driver end would have a flat bar with two cylindrical notches sticking out on either end of the bar. I'll attach a picture of the assembly too since I'm sure my description leaves something to be desired. :thanks:

Spanner wrench.

Awesome, thanks much!!!

:wave: