[ Eye End Fittings ] ¡Ü Quenched and Tempered. ¡Ü Hot Dip galvanized steel. ¡Ü Turnbuckle eyes are forged elongated, by design, to maximize easy attachment in system and minimize     stress in the eye. For turnbuckle sizes 1/4" through 2-1/2", a shackle one size smaller can be reeved     through eye. ¡Ü Modified UNJ thread for improved fatigue properties. ¡Ü Fatigue Rated.