References:
1. http:// www.wonkeedonkeetools.co.uk
2. http:// www. armyordnance.tpub.com
3. https://www.thespruce.com/how-to-use-a-hacksaw-1825102
4. https://www.wikihow.com/File-Metal
5. https://www.wonkeedonkeetools.co.uk/chisels/what-are-the-different-types-of-coldchisel-tip/
6. http://www.iadc.org/safety-meeting-topics/hand-tool-safety-files-chisels-hammersscrewdrivers/
7. https://www.dysoncentre.eng.cam.ac.uk/metal-working/threading
8. https://www.wonkeedonkeetools.co.uk/tube-cutters/what-are-the-different-types-oftube-cutter/
9. https://www.wikihow.com/Use-a-Drill-Safely
10. https://www.wikihow.com/Use-an-Angle-Grinder
11. https://www.wikihow.com/Use-a-Hammer-Safely
12. http://www.gajsupply.com/blog/uses-of-bench-vices/
13. https://www.wonkeedonkeetools.co.uk/vices/how-to-use-a-table-vice
14. https://www.britannica.com/technology/file-tool