Forged in the US from high quality carbon steel. Clevis hooks have heat treated pins. Hooks are heat treated and tempered. Finishes include self-colored, painted red, or bright zinc (ASME B633-85 Class Fe/Zn 5, Type III). Hooks embossed with chain grade, fractional size, and country of origin (USA). Hooks embossed with trace code providing traceability throughout manufacturing and testing process to heat of steel. Design ultimate strength equals 3 times working load limit, matching NACM specifications. Not to be used for overhead lifting.