My version of a heavy duty relay. Contacts are completly separated, the moving part of the core doesn't go through plastic pobbin, so it doesn't get stuck when the windings heat up, unlike most of the relays manufactured by bigger companies. Easy access to clean contacts via separate parts. No spring inside the core acting as a shortcircuit winding. Servicable on site and spare parts can cut costs to user, less plastic waste means less greenhouse gasses made with it. RoHS compilant, lead free.