Abstract: In order to increase the value of a key, in particular a flat key, e.g. a car key, the head of the key is manufactured of noble metal and releasably connected to the shaft 1 of the key. For connecting the shaft 1 to the head 2 a snap-locking mechanism is employed, which is brought about by pins 8 adapted to be inserted through holes of the head 2 and the shaft 1 and a clamping plate 6 which is insertable into the head 2. The technical effect of the key, which is adapted to be assembled, resides in the fact that when the vehicle is changed the head may be interchanged for a key of a different vehicle type or a different lock. It is also possible for the noble metal to be reused for other purposes.