A nice clear piece of aluminum, precision-crafted and no burrs. For such a clear timeless design you often have to take a lot more. Slight depreciation there but due to the screw ring: 2 out of 8 frame, the thread was a bit hakelig and since the ring as soon as a spot inside you is only able to rotate with the fingertips screwing was an ordeal. Before, back, and re-try, after all, it has worked out but with all frame. Will I get open the rings again after several years, I can not say.