Wiha 2m folding rule

Why buy a folding rule?

I thought that until I watched one being used in a video from one of the guys in the States. He had a folding rule with a slide out extending section that made it soooo easy to measure an internal dimension like a window opening.
You know that moment when you’re trying to get an accurate measurement with a steel tape? Trying to bend it down into the corner to get it exact?
Say goodbye to that drama and get one of these!