I had to buy an aftermarket wire wheel which did not fit properly because the aftermarket wire wheels are more narrow than the grinding wheels that come with the product. I bought a few washers which made up for the spacing issues and corrected the problem. The grinder itself is pretty powerful once it gets up to full speed and performed very well. In changing the wheels, it would have been helpful if there was some type of lock on the hub or a hole that you could put a screw driver through so you could tighten more easily.
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