The V55 MODULAR profile knob cylinder is perfect for front doors which need to open from the inside without a key, and it protects the doors against break-ins and unauthorised access thanks to anti-drill and anti-pick protection. The modular design means that the profile cylinder can be extended by 100 mm on the modular side. Extensions of 5 to 50 mm are available (in 5 mm increments). The knob cylinder has the keyed-alike system no. 20 and comes with 5 corresponding dimple keys with an individual code as well as a code card. Using the code, it is possible to produce duplicate keys with an electronic machine even without a sample key. The keys have an extra-long shoulder so that they can be easily used together with a security escutcheon. The large key head makes the key easy to hold and use.