5G STD Cylinder Modifiable Lock 30 x 40 mm 2 x 3 keys

European brass profile. 5 pin mechanism. Anti-drilling protection hardened steel pins at the 2 key ways. Driver cam made of powdered metal. 2 x 3 keys. Change of combination : in case of loosing keys of the first set, introduce a key of the second set = all keys of the first combination can’t be used.