CROSBY G-209A ALLOY SPA SHACKLES Capacities 2 thru 21 metric tons. Forged Alloy Steel – Quenched and Tempered, with alloy pins. Working Load Limit permanently shown on every shackle. Hot Dip Galvanized. Crosby products meet or exceed all requirements of ASME B30.26 including identification, ductility, design factor, proof load and temperature requirements. Importantly, Crosby products meet other critical performance requirements including fatigue life, impact properties and material traceability, not addressed by ASME B30.26. 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.