These diamond grinding discs have made my concrete grinding task much easier than I anticipated. The PCD crushed chip technology is definitely the highlight of this product. It allowed me to remove paint and coatings with ease, and the Husqvarna Redi-Lock system made it simple to swap out discs when needed. However, the set of three discs seemed to wear out faster than expected. I had to replace them fairly quickly, which can be costly if you have a large project. That being said, the performance is top-notch and the quality is clear. I would definitely recommend these discs for someone who needs to tackle tough coatings or grinds quickly as it gets the job done. Overall, these discs proved to be a great investment for anyone looking to tackle a tough grinding job. While they might not last as long as some other options out there, the performance is unparalleled. So, if you need to grind fast, choose the diamond grinding discs from Husqvarna Redi-Lock with PCD Crushed Chip technology.