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

I calibrated the ruler, boss : r/ididthejobboss

Found in a pair. Black metal, weighs the same as a large cell

All Rulers Are Not Created Equal

Delicate wooden whisk type thing that fits into a small vase item

Thin pressed-steel tool. Length 11cm or 4.5 inches, weighs 15g

Roll of tape with 3 columns of numbers, no seeming pattern

Small plastic clip type of object with a spring on it - 3/4 total

What are these tools/instruments for from 1772? Black bumpy

Ruler - Measuring tool

key type thing found in a bag of keys from previous home owner : r

FLANKENLINIENNORMAL Cutting Thing - 100 - 15°R, 15°L - What is

Make Precise Annotations Using the Ruler

Metal object about 6 long and hinged top. : r/whatisthisthing

What is this brown ceramic type block, it measures 10cm by 5cm by