Clamp nut head cracked at 140 ft/lb factory torque with a torque wrench! Contacted the company and they fixed me asap! Buddy also had these nuts on his truck and has had 13 sets of tires/wheels on his truck in the last 2 years and they still look brand new! Don't be shy, great product and great customer service at half the price of the competition. Without a doubt a good buy!