got a question... what are security pins? are they what make the locking mechanism jam when you apply tension? the pick proofing mechanism?
because im having problems with 2 locks i have at home...they both happen to have manufacturers logo engraved into it (like ABUS or YALE or in my case, SQUIRE) but the ones with no logo are opened no probls... i can open my money box with scissors or my pen knife!
also, its great having an engineer in the family

lost my tension wrench...he's going to get some steel so i can make another one...