Make sure to register your McGard wheel lock key! If you lose the key or it breaks (in my case) you can get a new one. However, I would not recommend locking the tuner's wheels if you change wheels frequently, for example for trekking or weekends, as the key part is quite fragile. Even with a hand torque wrench and only 85 ft-lbs of torque, the wrench part eventually broke and sheared off after a year of use. This is my third set but from now on I will only use road locks when my car is parked…