r/Firefighting 6d ago

General Discussion What do y’all call this ?

Post image

What do y’all call this tool

126 Upvotes

212 comments sorted by

View all comments

2

u/Reebatnaw 6d ago

It’s the ISO bar. The only thing it’s good for is an ISO point or two

2

u/joneptune FF/Medic 6d ago

This is the real answer, I presume.