Two-hand controls are used, for example, on presses and semi-automatic machines with manual loading. If there is a risk of injury to the operator, it must be ensured that both hands are outside the danger zone before the hazardous movement of the machine is initiated. It must also be ensured that the hazardous movement is stopped before the operator can reach the danger zone after releasing a control part. The ergonomic shape of the Safeball is perfectly adapted to the human hand, thereby supporting the natural grasp reflex. A conscious activation is facilitated by a light but distinctly noticeable click (comparable to a mouse click). The features of the Safeball include: ergonomic shape, easy and deliberate activation, high level of operational safety, no cover for control parts required, IP67. In addition to individual Safeballs, there are also ready-made portable two-hand controls available.