Euro Lock Cylinders that fit in perfectly with the Euro mortice Locks.
Solid Brass euro cylinders are compatible with Iver locks and door hardware.
Dual function means a key can be left in the cylinder on the inside of the door and still allow a key to be inserted and function the lock from the outside.
Key and Thumb cylinders are used where a key is required on one side of the door and a thumb turn on the other.
Link to mortice locks
Link to manufacturer website