@Ragnarok98
Thanks for the vid, very cool!
Okay, you saw the pins and the sidebar? Now add to that a series of ball bearings on the opposite side of the key way from the the sidebar.
The bearings (which are scattered across the key face, not in a line) are spring loaded so they always press into the key way and some of them fit into milled divots in the side of the key. Unless the correct key is inserted into the lock, the bearings are pressed back into the core in the wrong pattern preventing the tumblers from disengaging.
Because the bearings have to be depressed all at the same time to disengage the tumblers on that side you need to depress each one individually, and simultaneously, while also picking the vertical tumblers and actuating the sidebar as well.
It literally requires that the picker have 8-10 hands and be able to systematically try the bearing tumblers in 64 possible combinations (IIRC) until you hit the right one.
Oh, and ALL of the tumblers (pin, bar and bearings) may or may not be drill protected. This combination of factors make the lock unpickable under field conditions and damned near impossible in a workshop.
The standard procedure for a locksmith who has to deal with a broken or keyless one is to pull the entire core and send it back to Medeco for repair or to read them the serial number off the core for a new key to be made.
This concludes my TEDtalk, thank you for watching.