These are high quality spacers/adapters and studs. We were very lucky to be able to find them in exactly the size we needed. We have a set of almost new, slightly oversized snow tires mounted on standard 14" Ford steel rims with 5 x 4.5 lug spacing that we have occasionally used on our Ford Aerostar. distance between protrusions. The outer dimensions of the winter tires are very similar to the standard tires on the Astro Van. I thought I could find 14" 5x5 holed rims to re-install winter tires. Unfortunately wheels with this configuration haven't been used on cars and trucks for about 45 years so I couldn't find any wheels. These spacers/adapters made it possible for us to use the winter tires that we bought for our Aerostar on our Astro Van without having to mount them on different rims, they fit perfectly and were made with precision, quality workmanship using high quality materials When we fitted the rims Chevy and Ford measured with the outside edge to the hub, the Chevy rims were exactly 1.25" lower than the Ford rims. This meant that we needed 1.25" wheel shims for our Ford rims when we used the wanted to keep tires in the same position. 1.25" also gives us enough clearance to fit smaller discs on the front disc brakes. As for the negative reviews on these Adapt concerned. Broken bolts can be an issue when using this type of adapter, but this is an issue caused by improper installation, not poor workmanship and components. The most common bolt failure error is using jam nuts that protrude from the face of the adapter or not replacing bolts that protrude from the face of the adapter. If your wheel does not rest on the adapter surface. Your pins will break. The second most common problem is bolting wheels to the adapter with lug nuts that don't have a taper to fit the taper of the wheel hole in the wheel adapter. If you use a flat bottom eyelet in the wheel adapter your bolts will break. Wheel adapters also require extra effort to fit properly; the kind of extra hassle you probably won't get at a tire shop. Because there is no center hub for the wheel to rest on, the lug nuts must be carefully tightened in a back and forth pattern around the wheel to properly center the wheel before tightening with a properly calibrated torque wrench. If you don't do this, the wheel may still not be properly centered. Once you hit the road, gravity and vibration put a tremendous strain on the lugs. Some weaken while others take the full load and break. All of these topics have been discussed hundreds of times on online forums over the years. There are also dozens of videos showing correct installation and possible problems. Everyone agrees that spacers need to be tightened with a torque wrench, not just an impact wrench. They should then be rechecked with a torque wrench after a short drive and then rechecked after about a hundred miles. You would think a tire and rim shop would know that special care should be taken when mounting wheels on spacers like this, but unfortunately this is not the case in many shops. The people who actually put the wheels on the cars aren't necessarily the most skilled people. You will find that this situation is particularly bad in large stores that also sell tires. So we started fitting and balancing our own tires and fitting wheels on our cars ourselves. We don't do this to save money; we do it because we have had so many difficulties in the past. mostly with shops that break great bikes. In summary, a really good product. Negative reviews from people with broken rivets are most likely from people who didn't install them properly. The ones sent to us are beautiful and the stilettos are also of high quality.