Based on our own experience, these washer accessories are a must-have for any automotive enthusiast looking to upgrade their wheels. The 12x1.5 thread size is perfect for most vehicles and the close end design provides a sleek, finished look to the lug nuts. The quality of the materials is impressive and these washers have proven to be durable through various weather conditions .The only downside we've found is the price, which is a bit steep for a small accessory. However, we believe the benefits outweigh the cost in the long run..