I recently purchased the Hub Centric Billet Spacers for my 5X100 / 5X112 bolt patterns and was excited to see how they would improve the handling of my car. The T6 grade billet aluminum material used to construct these spacers is of high quality and ensures the durability of the product. The 5mm thickness of the spacers provides a noticeable difference in the handling of the car, however, I was disappointed to find out that they do not come with a lip. This caused some stability issues when driving, and I had to add an additional layer of adhesive to make sure they stayed in place. The 57.1mm center bore of the spacers is precise and provides a snug fit with the car's wheel hub, which is a huge plus. Moreover, the machined finish of the spacers gives them a sleek appearance. Installation was relatively easy and straightforward, and the spacers came with all the necessary hardware to complete the job. Overall, I would rate these spacers 3 stars. While they do provide an improvement in handling and a sleek appearance, the lack of a lip can lead to stability issues, and extra adhesive may need to be added to keep them in place. However, the quality of the material and precise center bore are impressive features of the product.