End-of-shaft sensor magnets, also named as on-axis sensor magnets, are used for the measurement of rotation angles in many applications. This is especially valid for automotive industry but also for other technical fields. Usually two pole magnets of different kind but sometimes also magnets with larger number of poles are used together with multi-dimensional Hall sensors or field angle sensors on magnetoresistive basis. Different kinds of magnetization as well as magnet geometries can lead to different features with respect to subjects like angular accuracy, field strength or distance range of sensors. Other subjects which are impacted are stability against external fields, against thermal ageing or the distribution of stray fields, which may influence other parts of the application systems. Also the sort of materials in the vicinity of the magnet-sensor system can be of importance. The presentation will provide the basic sorts of magnetization schemes and will show which one has to be used for which purpose. It will explain the basics how magnetic fields of those magnets can lead to a distance and temperature independent measurement of a shaft rotation. It will explain further why geometry can influence the characteristics of magnet sensor interaction and by which measures the magnetic quality can be tuned towards a higher level. Impacts are also the magnetic characteristics of materials close to the magnet-sensor system, which can both have a negative or a positive effect. Another issue is the accuracy of assembling of magnet and sensor relative top each other. Slight misalignments can lead to large linearity errors. On the other hand deliberate tilts of sensors relative to the magnet can even be used to improve accuracy of the system, which will be explained in the talk too.