Euro Profile For use with locks accepting Euro profile cylinders. Cylinders are supplied with fixing screw. Extended length cylinders, decorative and security accessories are available. The M20 high security Euro cylinder range is also available offering high resistance to snapping. 3923 - Single CylinderFor use with locks accepting Euro profile cylinders. 3922 - Double CylinderFor use with locks accepting Euro profile cylinders. 3927 - Cylinder with Oval Turn For use with locks accepting Euro profile cylinders. 3924 - Cylinder with Small Round TurnFor use with locks accepting Euro profile cylinders. 3921 - Cylinder with Large Round TurnFor use with locks accepting Euro profile cylinders.