Although the product is made in China, it appears to be of good quality. Let's see how they behave after 20-30 thousand kilometers. I liked the fact that one set is needed only for car repair. Also, the price was less than a set of front brakes and discs from any major auto parts store. I recommend anyone dealing with tail rotors and glitches to watch the YouTube video first. It's not rocket science, but you may need special tools. On my Ford Edge, the rear cylinder is screwed on with a special tool. The tool is not included but can be purchased from most auto parts stores for about $10. And if the rear rotors have a set screw, they usually have a T40 Star tip and are easy to remove. I filled mine with regular lube and let it sit for 30 minutes. I then tapped the bolt with a hammer and then tapped the end of the sprocket tip before loosening it. I took both apart and found a replacement for $7.50 each at my local Ford dealer.