The Sensei PRO 55-58mm Aluminum Step-Up Ring permits the use of 58mm threaded filters on lenses with 55mm filter threads. It has large side knurls to provide a more textured grip when mounting or removing it from a lens. This step-up ring features a lightweight, aluminum-alloy construction that has a corrosion-resistant, matte black, hard anodized finish for durability and to minimize reflections.
I always look for Sensei rings, ALWAYS. They don't get stuck like other rings do, and they have ridges for ease of use.