PZ 72 vs. 92, BB vs. PZ vs. WC: hole patterns & lock types explained

Measure from the center of the square to the center of the keyhole. This measurement is called the "distance" and is usually 72 or 92 mm in residential buildings. Keep the center really exact, otherwise millimeter errors will creep in. Make a note of the result directly on the photo of your door so that you don't get anything wrong. This way, you can order the right fitting straight away.

Interior doors predominantly use 72 mm because they carry lightweight fittings. Apartment and front doors often use 92 mm with profile cylinders and robust security fittings. Bathrooms require internal locking plus emergency unlocking from the outside. Therefore, always check usage, security requirements and the desired operating logic. This way, the technology fits in with everyday life.

72 mm is suitable for light, frequently used room doors. Rosette or short escutcheon sets have a delicate appearance and are easy to operate. They run smoothly and have a tidy look. Nevertheless, make sure you use stable substructures so that nothing gives way. This keeps the handle free of play.

92 mm supports PZ locks and solid security fittings with pull protection. This increases resistance and durability, especially on entrance doors. Check the cylinder length carefully, both inside and outside. The cylinder must not protrude and should be flush. This ensures convenience and protection in one step.

Do you want privacy but no burglary protection? BB is perfectly adequate for living rooms and children's rooms. The key is uncomplicated and inexpensive. You can count on low maintenance and solid suitability for everyday use. A different solution is recommended for sensitive areas.

Do you want more security or are you planning a locking system? Then choose PZ. Determine the exact cylinder length according to door thickness and fitting thickness. Think about the emergency and danger function in case someone locks the inside. This means the door can be operated at all times.

Toilet locks lock on the inside via an olive and can be released on the outside in an emergency. This protects privacy while remaining secure. Make sure the red/green indicator is clearly visible. Also check whether children or older people have a good grip on the olive. This will prevent misunderstandings and stress.

Determine the distance (72/92 mm), measure the door thickness and note the DIN direction. Take a photo of the lock, fitting and striking plate in plumb. Mark the dimensions directly on the picture to help when ordering.

Really measure from center to center and not along the edges. Compare your result with a second measurement to reduce outliers. Never confuse 72 and 92 mm, it is better to check once more. If you are unsure, use a drilling template or ask a specialist dealer. This will help you avoid costly mistakes.

First clarify the type of your door, then measure the distance and choose the lock type. Then decide on the backplate shape and finish. Finally, check the cylinder length and accessories. With this procedure, you can make every choice with confidence. The result is technically and visually perfect.

Use coordinated sets if you are using PZ. This simplifies ordering and reduces compatibility risks. You save on shipping and installation time. At the same time, you get a coherent design from a single source. This makes installation a one-off project.