Check out the “Let it Snow” Xmas 2020 Group youtube project!”
I thought it might help some people here to see what tools are close at hand during violin practice. I will caution you now that tools should not be close at hand during violin practice. They are a distraction. It is tooooooo easy to stop practice to adjust something, change something rather than practice,,,don't do it, it will never end.'
Having said that some tools are cheap and handy. Harbour Freight sells cheap tools which work for our needs. The weight scale was $9. The files (red bag rolled up)$5. The calipers $9. At hobby lobby the cloth tape measure $1 (inch 1 side, metric the other side). Ebay $3 nut files. I made chin rest tool from key off a can of corn beef. Fm sells the sound post setter.