This is the LM-NZ EX mount adapter from Kani Koubou. It is a non-helicoid type. I purchased it new about two years ago, but I haven't used it much, so I'm selling it to organize my equipment. There are no functional problems. The accessories are all shown in the photos. Please consider purchasing only if you agree to no cancellations/no returns, and can respond within 24 hours of purchase and receipt. Also, I am listing this on other sites, so please forgive me if it sells out.