Tell us about yourself!
Chuck the in a lathe and use a parting tool.
Check with companies that sell carpet. the rolls of carpet are on heavy long tubes. Also some stores dispose of displays take are made with tubes.
The picture on the left is 2 parts of what would come as a combination square. What's shown is the center head and the protactor head, there would also be a 90/45 degree head. The rectangular piece with the small scale is a depth gauge. The photo on the right are spanners typically use to adjust mircometers.
Your First Rise
Metalworking Tools and Materials
LEDs and Lighting Class
Raspberry Pi Class