This key operated safety switch for guard doors, with adjustable turret head switch, has a robust red coated Zamak body with one cable gland entry, allowing an easier installation. It's IP67 degree of protection makes it ideal for heavy duty use in harsh conditions. When wired as recommended in relevant standards, it conforms to Cat 4, performance level PL e, SIL 3 and complies with EN/ISO 13849-1, EN/IEC 61508.