I've run through 3-4 of these already and I'm really not impressed. The first thing I noticed was that the disc wobbled a lot when cutting. I stopped my grinder because I thought that either A. the pulley was loose or B. something was wrong with my grinder (e.g. a bearing has failed). It turns out that even with a fairly light pressure, these discs bend very much. They wobble and bend as you cut, making it very difficult to get a straight cut. I also had a separate drive like a thin layer separate from the main drive (sort of a split like separating 2 layers of a piece of toilet paper which was of very little use. I bought these because I thought it would be a great way to saving some money on the drives, but mostly they just sit on my shelf now and I've gone back to using the more expensive Home Depot and Lowes drives (which just confirmed how bad those drives are.) End, one Waste of money, and in fact only good for inaccurate cutting.
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