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Text in the video: Hello. This is a ruler for measuring, for mortise and key impressions. Here is just a ruler 3 cm on the side. Here are sizes from 10 to 28, this is in millimeters, 1 mm step. The back side is not working, it just exists. What is the essence of the work? Open, make a turn. Let's say you have a certain pattern on the impression. And you need to take the size or make a second turn, or just measure. You select. Here is our front side. Fourteen. The second is seventeen. This is eighteen. Well, here is nineteen. Well, and so on. I think it is clear. That is, this is how we measure each height. Well, we wrote it down and there is a size. Then you can either set the pattern on the impression again with pins, or assemble a full-fledged key on a double-sided impression with setting pins. Well, basically, that's all
