Бесшумный дверной замок STV Medium

The silent lock is designed for interior doors for handles of the European DIN standard. Extremely silent closing and opening of the door and silent operation of the lock. The tongue of the lock is made of extremely strong thermoplastic ABS, which ensures perfectly silent and long-lasting operation. Locking method BB (universal "buratino" key). 
Distance between centers (handle and key/wc knob)  BB - 90 mm, PZ - 85 mm, WC - 96 mm. 
Backset  - 50 mm.
Adjustable frame plate. 
Universal lock: for left- and right-hand doors (very easy to change the side without additional tools), for both flush and rebated doors (with curb / rebate). 
The locks are particularly durable (tests performed for 500,000 turning cycles according to standard UNI 9173:88).