BKS cylinders are supplied as standard with three steel keys made of heavy gauge. The cylinder has 5 locking pins and offers an SKG** certification. Here you will find the knob cylinder version: In a double knob version PZ88 SKG** brass nickel plated cylinder incl. 3 steel silver keys with drilling obstruction different closing and equal doors available. Please note when selecting a knob cylinder which side you want the knob to be on with a different size. Inside dimensions is knob side