Thank you for viewing. This is the SHOTEN helicoid-equipped mount adapter "LM-NZ M EX". It allows you to mount Leica M lenses on Nikon Z bodies. Lens attachment and detachment are smooth, and the helicoid operation is good. There is no box. As shown in the photos, only the adapter body and rear cap are included. SHOTEN Mount Adapter LM-NZ M EX (Lens Side: Leica M / Body Side: Nikon Z) Silver with Helicoid Brand: SHOTEN Lens Mount: Leica M Body Mount: Nikon Z Infinity Correction Lens: None Mount Adapter Function: Helicoid