The adapter is made of solid metal, a rubber bottom surface has thus because nothing can slip, the wheel to tighten the binoculars is made of thick plastic and the whole thing will not budge after installation, because nothing wobbles.
The center column is about 1cm thick, so that this adapter is good for Porrogläser suitable!
Who has a roof prism glass should possibly measure it, the there could otherwise be problems, because the tubes are often closely at roof prism glasses to each other!
Who wants to combine his Porroglas with a tri or monopod, here gets probably the best of the adapter is currently being offered for little money!