The ASSA Twin Combi 5800 cylinder offers extremely high security and full resistance to any currently known method of picking. It includes case-hardened drill-resistant inserts, a patented sidebar mechanism incorporating the Code Level 7 security function, and patented keys. Well over 1,900,000,000 usable differs are available per key profile worldwide. Twin combi 5800 are fully protected by new international patents against unauthorised duplication. All ASSA Twin Combi key profiles are restricted.