What is this technique at 8:40 in this video?

https://lemmy.ca/post/62946420

What is this technique at 8:40 in this video? - Lemmy.ca

How is he routering freehand such a straight line on an uneven surface? I want to do this.

@NataliePortland

It's a "trimmer" (like a router but smaller, thus less expensive) to make a "canal" where to place a LED strip.

Oh interesting! Okay and what kind of bit do you think it’s is?

@NataliePortland

I bet on a straight one.