Maximum reliability. The locking system SPHEROLOCK® is ideally suited for a wide range of applications. Due to the modular design and the use of specially adapted stock rail attachments or tongue attachments all commonly used rail profiles can be equipped. Optimum retrofitting is achieved through short replacement times, minimal adjustment work and no mechanical rework on the construction site. The compact design enables use in the intermediate sleeper case or a hollow steel sleeper at normal gauges but also at narrow gauges and broad gauges. In conjunction with a force system, it also is possible to equip turnouts with bigger radii and thus several switching levels even if there only is one point-operating unit.