A secure fit for the wheels on your car or truck is one of the most important factors in keeping your family safe on the road. Whatever you're driving, if it has wheels, it needs lug nuts. Lug nuts are essential to mounting and securing a well-balanced wheel for your vehicle. Without the secure fit given by properly installing and tightly fitting the right lug nuts, wheels can gradually move out of alignment and eventually detach from their axles. Replace for Vehicles with 4 or 5 Lug M12x1. 5 Threads Only Fits Wheels with Acorn (Conical Taper) Seats