ON WHICH PINS TO USE IT ? Pins : - DIN 7979, - DIN 7978, - ISO 8735, - ISO 8736 de 5 à 20 mm. Knockout screws : from M3 to M10. Keys : - DIN 6885 E, - DIN 6885 F, - NFE 22181. FOR WHICH USERS ? - Assembly technician. - Service Engineer. HOW TO USE THIS TOOLS ? 1- Choose a stud adapted to the taping of the pin and screw it onto the extractor axis. 2- Screw this unit onto the pin. 3- Hit the counter weight against the head of extractor so that the pin ejects.