The V50 MODULAR profile half cylinder is perfect for lockable electrical switches, key safes, alarm system locks, garage doors, cabinet doors, padlocks and much more. The anti-drill and anti-pick protection provides optimal security against break-ins. 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 half cylinder has the keyed-alike system no. 21 and comes with 5 corresponding dimple keys as well as a code card. 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.