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 dangerous movement of the machine is started. It must also be ensured that the dangerous movement is stopped before the operator can reach the danger zone after releasing an operating part. The ergonomic shape of the Safeball is perfectly adapted to the human hand and thus supports the natural grasping reflex. Conscious activation is supported by a light but clearly noticeable click (comparable to a mouse click). The features of the Safeball are: ergonomic shape, easy and conscious activation, high degree of tamper-proofness, no covering of the operating parts required, IP67. In addition to the individual Safeballs, there are also ready-made portable two-hand controls.