On the advice of other reviews I ran a tap through the threaded holes. They also had to be tapered by about 1/8 inside the shock mount area. just to accommodate the shock. DO NOT TIGHTEN ANYTHING UNTIL YOU GET EVERYTHING TOGETHER. Overall, they are very durable compared to others available. I'm not disappointed with this product but you can't just put them on. You'll probably need to work on making them fit.
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