Euro single lock cylinders for mortice locks. The particular brand I have in stock are the WKS, which I found to be very reliable when I ran Fitting Services and actually went out in a van a physically replaced lock cylinders.
Suitable euro single replacement cylinder for most brands including Union, Yale, Chubb etc.
You will find these cylinders used in some garage door lock mechanisms.
This product includes free access to the Replacing a Euro and Oval Profile Lock Cylinder for 30 days.