GeGe P-Extra

[SnowyBoy]

Looking for info and detailed breakdown for one of these. Would like to know what the black pin at the back is for really above all else.

Thanks in advance

[mseifert]

the black pin appears to be addition locking pin, The key will have a groove parallel with the bidding that will push this pin inline withthe shear line..

The Gege range of cylinders offers high security with the patented branch groove that cannot be copied
with common key milling machines. The optional blocking pin recognizes if an illegally made duplicate
key has been inserted into the cylinder. If the branch groove is missing, the blocking pin moves into the
key profile and prevents the cylinder from being turned in one direction.

Features
Protected by several Austrian patents
Meets EN 1303 Key Related Security Grade 4, and with the blocking pin Key Related Security Grade 6
EN 1303 Attack Resistance Grade 2 (optional)
The blocking pin prevents unlocking with illegally produced duplicate keys
The patented centering pin prevents opening by the „bumping method”
Protected against picking by an overlapping key profile and special tumbler pins
Anti-drilling protection by additional steel security elements in the cylinder housing and barrel
Increase of permutation capacity with side elements

And a video

https://www.youtube.com/watch?v=oDpLQmHiTxs

[ARF-GEF]

The back pin is not present in all locks, so don't be too surprised if you can't find one. Not sure why :S

[SnowyBoy]

Cheers guys, very helpful.

I've seen these on eBay for a tenner, might get a few in to practice on since someone requested this model to be cut. Can never get a true image of what's going on until it's in my hands :/

ARF-GEF - hopefully the one this guy sends won't have it! Less for me to work around then >_<

p.s your locks came