Cylinder lock assembly with non-rotating elements

A key device comprising:

• a shaft comprising a key-cut surface capable of being cut for forming inward key cuts thereon, said shaft having a relatively wide surface extending from a relatively narrow edge surface;
• a key head mounted on said shaft;
• and
• a fixed key element protruding outwards from said relatively wide surface of said shaft, wherein said fixed key element comprises a fixed oblong protrusion arranged at an acute angle with respect to a center line of said shaft and wherein said fixed oblong protrusion is flanked on both sides by auxiliary protrusions which have inner sides arranged at an acute angle with respect to the center line of said shaft, said inner sides spaced from and facing towards said fixed oblong protrusion, and wherein said auxiliary protrusions are shorter in length than said fixed oblong protrusion, length being defined along said acute angle.