These discs arrived very quickly, were very well packed and boxed. The instructions and diagrams were fairly well written and easy to understand. Let me tell you, these things are WHITE! I bought these for my 2006 Scion Xb which is white but not as white as these. These discs are BRIGHT WHITE! I'm NOT a RED guy, just a normal guy. They look better than the dirty old silver plastic parts we usually buy with our cars. Each was too large to be properly attached to the discs. I had to pull the inner metal bracket out of the holders (EASY) and place it on the workbench. I tried putting the hook into the loop as shown in the instructions but the suction cup slipped off on the bench. I put a weight (SAND BAG) on the rim, grabbed a couple (Vice Grips) and squeezed the hook a little. And again got the loop back into the rim (60 seconds) and the rim continued a bit normal here and there (palm clapping). It took less than three minutes to set up and fasten each rim. Not bad. Advantages: Made in Germany! (((NOT CHINA! ))) Cons: The Germans should have just used a set screw that customers could tighten or loosen, instead of forcing us to do what we did just to hire them! That's the sigh of someone trying to save just a total of $1 in manufacturing costs on proper four-wheel adjusters. It is a pity! I recommend this product to everyone!