This key series was developed with the aim of ensuring greater ease of use and better handling. Since conventional models easily slip through the fingers, the FAB Assa Abloy key series features an atypical and robust design with a special S-shape. As a result, the force is distributed symmetrically over the shaft of the key when it is turned, so that neither side is overloaded or can break off. In addition, a narrow horizontal knurl has been applied to the contact points, giving the individual key a better grip.