Cylindrical Locks are usually seen on uPVC doors and in business buildings where doors are frequently re-keyed. As a result, they are suitable for all types of doors. They are simple to change and do not necessitate the replacement of the lock. To provide even more security and features, single and double cylinders are available. Cylindrical Locks act as a locking mechanism that allows a mortise lock case to be locked and unlocked using a key. These are great for rooms that need regulated access from one side but easy access from the other.