with Tim, and will add one more piece of advice. Replace all of your studs and lug nuts. You don't want this happening again, and since one set has failed, the rest are likely to fail. In addition to using a torque wrench, keep the studs lubricated. A drop on engine oil works great. It helps to prevent thread damage when tightening, and most torque values are set up for use with engine oil lubed threads.