Easily screws onto the front of any Lens with 52mm Filter Diameter, and converts the thread size of your lens to the thread size of any other 67mm accessory The Male Side: 52mm The Female Side: 67mm Made of high quality anodized aluminum and polished with strict surface treatment to avoid wobbling or cross-threading, combined with a slim design makes this ring durable and functional. Suitable for a wider variaty of Filters, Adapters, Hoods and more.