This should be stated in the description so I hope potential buyers read this review. This item will NOT work with roof prism binoculars and lenses larger than 42mm. The cylinder holding the threaded bolt is too wide. I have 10x42mm and 12x50mm Bushnell Engage binoculars. It is not attached between the lenses of either. It can be fitted to a 10x42 model, but if you need to narrow the distance between two lenses for your eyes, forget it. I'll find something narrower that might work. Otherwise, as with most Vanguard products, the quality and finish of the product is really solid.
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