This product is a vintage Mercedes Benz tool kit, specifically including 15, 16, 17mm and 21mm spark plug socket wrenches. The wrenches are designed for a 6-point drive type and are of metric size. Made in Germany, this single item set is ideal for automotive maintenance tasks, especially for Mercedes Benz vehicles. The set is manufactured with the part number 767 and includes an interchange part number 0005810567, offering convenience and precision for automotive repair and upkeep.