Product details:

Crosby's screw pin anchor shackles can be used in tie down, towing, suspension or lifting applications. Shackles are forged quenched and tempered with alloy pins. Shackle finish is hot dip galvanized.Forged - Quenched and Tempered, with alloy pins.
Working Load Limit and grade "6" indelibly marked on every shackle.
Hot dip-galvanized or self-colored with red pin.
Fatigue rated.
Shackles >25t are RFID-equipped.