Secure your new wheels with Rough CountryŸ??s Bulge Acorn Style Lug Nuts. These cold-forged lug nuts are plated with a beautiful chrome finish for a long lifespan of corrosion resistance and good looks. Acorn bulge nuts provide over 6% more seating surface area than a standard acorn lug nut. These premium lug nuts are the perfect choice for securing aftermarket wheels, and far exceed OEM strength and hardness.