BKS cylinders are supplied as standard with three steel keys made of a heavy quality. The cylinder has 5 locking pins and offers a SKG** certification Profile cylinder double PZ88 SKG** brass nickel plated cylinder incl. 3 steel silver keys with drilling obstruction different closing and equal closure available. If equally closed please take into account a short delivery time: Comes with danger function / hotel function: means that if on the other side a key unexpectedly sticks in, the cylinder can still be operated on the other side.