Abstract: Deformation device with a machine frame on which a pair of tools is arranged, wherein one of the tools is arranged on the machine frame so as to be relatively movable along a movement path and the tools form a size-variable working gap and wherein a first optical safety device is assigned to the movable tool, the safety device comprises a first beam source to provide a first beam bundle parallel to the end surfaces of the tools and a first light receiver to receive the first beam bundle wherein a second optical safety device is assigned to one of the tools, the second optical safety device comprises a second beam source to provide a second beam bundle and a second light receiver to receive the second beam bundle to secure a side surface of the tool aligned normal to the movement path and bordering on the end surface.