Also a video of Samy demonstrating why the attack works here: https://youtu.be/qkolWO6pAL8 https://youtu.be/qkolWO6pAL8 It's interesting that the first digit o

Also a video of Samy demonstrating why the attack works here: https://youtu.be/qkolWO6pAL8 https://youtu.be/qkolWO6pAL8 It's interesting that the first digit of the combination can be found due to a design shortcut taken by Master. The inner and outer discs are manufactured identically which means that there is a redundant protrusion on the outer disc which causes detectable friction when it hits the shackle collar. If Master manufactured the out disc separately, without that protrusion, the first digit would be much harder to discover.