3/64 7x7 Galvanized Aircraft Cable 500' Foot Reel. Minimum Break Strength=270lbs, Working Load limit=54lbs, Imported, Standard: US FS RR-W-410. Commercial Grade: not intended for aircraft use. Warnings: Wire rope & aircraft cable should never be used at breaking strength. 10:1 safety factor minimum is recommended for critical/overhead application. Do not use for overhead lifting without consulting a wire rope rigging professional. End fittings may not hold to 100% of strength efficiency so safety factor such as 5:1 should be divided into the assembly actual strength. A pull test is recommended for quality assurance.