Ruler: Type and how to use? : r/whatisthisthing

What is this small bulk like electronic component? : r/whatisthisthing

what is this line on my metal ruler : r/whatisthisthing

A ruler + letter opener + ? What is the use of these numbered

Interesting piece of lead found while metal detecting. The item is

Aluminium ruler with Dupont paint brands on it. the ruler has

4in brass and copper object about 1lb or so nothing moves on it

Aluminium ruler with Dupont paint brands on it. the ruler has

How to Use a Metric Ruler

iGaging Rigid Stainless Steel 4R Rulers (1/8, 1/16, 1/32:, 1/64

Starrett Spring Tempered Steel Rule with Satin Chrome Finish

What Is This Thing?”: 50 Times People Stumbled Upon Mysterious

This 6 ruler with raised metal studs. One has a point and one has