Capacities 1/2 through 35 metric tons. Forged - Quenched and Tempered, with alloy pins. Working Load Limit permanently shown on every shackle. Hot Dip galvanized or Self Colored. Sizes 3/8 inch and below are mechanically galvanized. Fatigue rated. Shackles 25t and larger are RFID EQUIPPED. Shackles can be furnished proof tested with certificates to designated standards, such as ABS, DNV, Lloyds, or other certification. Charges for proof testing and certification available when requested at the time of order. Shackles are Quenched and Tempered and can meet DNV impact requirements of 42 Joules (31 ftIbf) at -20 C (-4 F). Look for the Red Pin . . . the mark of genuine Crosby quality.