This is a K&F CONCEPT mount adapter that converts Leica M mount lenses to Sony E mount. (Confirmed to fit on α7III) From the reliable K&F Concept. I am selling this as I am replacing my adapter. Immediate purchase is welcome. AI-generated description below ↓ [Brand and Model] The K&F CONCEPT L/M to NEX mount adapter is an essential item for expanding lens compatibility. [Material and Design] Made of sturdy metal construction, it is highly durable and can be used for a long time. The black finish is stylish and does not detract from the appearance of the camera. [Functionality] Equipped with a locking mechanism, it can securely fix the lens. This prevents slippage or detachment during shooting. - Brand: K&F CONCEPT - Type: Mount Adapter - Compatibility: L/M to NEX - Material: Metal - Color: Black - Features: With locking mechanism - Shape: Circular Thank you for viewing.