The variable blind cylinder BZV 100 is individually adjustable for door thicknesses between 45 and 125 mm. For door thicknesses of 33 to 45 mm, the threaded bar and screw must be shortened by 15 mm. A blind cylinder, also known as a dummy cylinder, allows the hole in the door for a cylinder lock to be sealed easily. The matt nickel-plated blind cylinder is simple to install without drilling.