Gorilla Lifetime Lugs. Beauty, precision and a lifetime guarantee. Gorilla Lifetime Lugs have set new standards in lug nut design and construction. - They are engineered to surpass the highest OEM quality standards and manufactured to remain rust free for life. Chrome plated finish - the very best lug nuts you can buy. - Triple nickel plating prevents rust and corrosion - Chrome plated finish exceeds 240 hour salt spray test - Cold forged and heat treated for superior hardness - One-piece construction for lasting durability - Rockwell hardened to 35-40 C scale - Individually hand-polished for a beautiful finish - 5-point quality control inspection ensures exacting standards