An input device is provided that has tactile features for assisting a user with locating an actuator andor that has features for avoiding inadvertent actuation of an actuator. Breaking of these punched parts is performed by pivoting upwards a main ring mounted on a rivet of the lid and, after breaking open the punched part, pushing downwards a secondary lever with cutting pressure pieces which cut into the punched parts so as to cause breakage thereof. The refrigeration device compressor and fan are disabled over a second time duration and the real-time temperature is allowed to slowly rise, never exceeding an established maximum temperature. Depending on the metal-working technique, a two-component nozzle is preferably used for supplying the first and second cooling lubricants, the jet of second cooling lubricant surrounding the jet of first cooling lubricant concentrically. In the preferred embodiment, the end plates are positioned against the end surfaces of the bone section through the use of a link member, which passes through the interior of the bone section and connects the end plates. Furthermore, by providing this active alignment or tracking scheme, the techniques of the present invention allows optical systems to more effectively operate at smaller channel spacings, i.