At the Belmalia 7 Step Up Rings are available for the price (5,99.- EUR) not much to complain. The rings are made of metal and can be excellently turning into the filter thread of my lenses. A 77mm filter can be rotated well on the corresponding ring. Only when you try to turn two rings into each other, it hakelt a little. However, with a bit of flair, you have the hang out soon.