Our 1" anchor is rated to 10,000 lbs. or 44kN with a safe working load of 2,000 lbs. Our 3/4" anchor is rated to 5,000 lbs. or 22kN with a safe working load of 1,000 lbs. For use in rock or concrete as a work anchor or rescue anchor. Read and follow instructions and safety warnings carefully. ANSI Z359.1 compliant.