This is the ISEO Euro Single Cylinder using a 5-pin open profile* to allow keys to be cut easily but is resistant to manipulation. 

It has an adjustable cam as standard so can be fitted to euro body padlocks and panic hardware. (Please be aware that part number I092510N does not have an adjustable cam).

This cylinder is also EN 1303 tested and FD60 fire rated. Iseo cylinders are high-quality premium cylinders made in Italy.

Their construction makes them perfect for keying alike and master keying where an open profile is required.

*Due to the size of the 25/25 50mm cylinders they are 4-pin and are not compatible with the 5-pin versions. They are, however, still anti-pick.