Sheep-eye expansion screws (also known as lifting ring expansion bolts, hook expansion screws) belong to expansion fasteners with lifting rings and are a special 细分品类 of expansion screws.They are mostly made of carbon steel with color zinc plating, having basic rust-proof capabilities. They are mainly used for indoor and outdoor suspension installations, such as lamps, ceiling fans, storage baskets, billboards, small security equipment, etc., and are also suitable for the construction of temporary load-bearing hanging points during decoration.