Eaton SL7/4-BET (catalogue no. 171294) is a bulb-change tool accessory for SL7 signal towers, used to install and remove incandescent lamps in stacked indicator modules. The 78 mm long tool grips the lamp so it can be threaded into the socket without direct finger contact and without disturbing adjacent segments. It is compliant with CE and rated for ambient operation from -30 to +60 °C. Typical application is field maintenance of Eaton SL7 signal towers on machinery and process installations.