The BKS cylinder has 5 locking pins and offers a SKG** certification Here we are talking about a knob cylinder variant: In a double knob version PZ88 SKG** Nickel plated brass cylinder Supplied without keys with drilling obstruction, the cylinders are both differently closed and equally closed. If you want the same key please take into account a short delivery time: because it concerns custom work. When selecting a knob cylinder, please pay attention to which side you want the knob to be on with a different size. Inside dimensions is knob side