Contents
1. security pins
原理の図解 https://www.youtube.com/watch?v=smIdInCQ-kU
How Lockpicking Works https://www.youtube.com/watch?v=TjRj69P5rKM
How to pick open a lock with paper clip - life hack https://www.youtube.com/watch?v=8lQJlWmR1Ko
https://www.youtube.com/watch?v=fMe2b6n2q-w
https://www.youtube.com/watch?v=dzvS2qsW0AE
normal, spool, mushroom, serrated pins
https://www.youtube.com/watch?v=DbpvTHQ46KM