What is a thumb screw used for?

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Tags

1. #crush
2. #surfaces
3. #protruding
4. #fingers
5. #instrument
6. #which
7. #simple
8. #studs
9. #applied
10. #slowly
11. #europe
12. #first
13. #sometimes
14. #prisoners
15. #thumbscrew
16. #victims
17. #placed
18. #crushed
19. #torture
20. #thumbs
21. #interior
22. #medieval