Door cylinders, also known as cylinder locks, are highly secure locking mechanisms designed for UPVC doors but also suitable for both external and internal doors. These locks feature a mechanism with pins of varying lengths that align correctly when the key is turned, unlocking the door for enhanced security. At Lockshop Direct, we offer an extensive range of cylinder locks, euro cylinder locks, and mortice locks that are easy to install and re-key when necessary. Choose a trusted cylinder lock to protect your property and say no to thieves.