These mounting rings are exactly as described and look solid and well made. But they are small. like a little one. Smaller than US quarter size (25 cents). Width 27mm. Hole 17mm. Bolt hole M8 or 8mm. The thickness of the steel is 2.5 mm. Not bad. Did I mention they are small? I'm not sure I'll be strapping these rings to my bike, but they're well made and I'll "repurpose" them for another project.
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