Two tensioners with backlight and magnifying glass.
Text in the video: Hi. This is optics, tensioners and a flashlight. Basically, three in one. How does it work? Well, it's just a flashlight. The tensioners are screwed on and each of the tensioners has diodes in these places. Turn it on. I think it's visible. Well, in general, it's like a car flashlight or something else you can use it for. You can, for example, crawl under with a flashlight like this somewhere where you need to look. Into the depths, somewhere else there. You can crawl under and look. This can also be convenient. They differ in thickness. Length, thickness. You can stick a magnifying glass here and, for example, look into the lock through this magnifying glass. The camera won't focus, but I think you get the idea. That is, we look through the magnifying glass and you can see well with the backlight. Well, in general, this is the set.