The Super 55 slat is a type of roller shutter slat used in the construction of roller shutter doors. It is designed to provide durability and security to the door while offering ease of operation.

The spring fastener is a component used in conjunction with the Super 55 slat to secure it in place within the roller shutter assembly. It helps to keep the slats aligned and prevents them from sliding out of position.

The specific details and design of the spring fastener may vary depending on the manufacturer and the specific roller shutter system being used. It is advisable to consult the manufacturer's documentation or contact them directly for precise information on the Super 55 slat and its associated spring fastener.