AOP precast produced swiftlift lifting eye which use special 35Crmo steel materials to ensure the head can well work. The swiftlift lifting eye must coordinate 100% to spherical head anchor very well. The swiftlift lifting eye head was casting by special steel materials. Then the head will be special head treatment to improve the mechanical behavior. The swiftlift lifting eye need to inspect by crack detector to check the welded quality in the hook. The swiftlift lifting eye head have a spherical grove to lifting spherical head down surface. The two spherical surface must occlusal each other. Or the lifting anchor spherical head easy to broken. This is the key reason to design the lifting anchor products.