SHOTEN metal mount adapter with a circular design for excellent durability. - Brand: SHOTEN - Type: Mount Adapter - Material: Metal - Shape: Circular Thank you for viewing. I purchased this about a year ago for around 15,000 yen and used it a few times before switching to one with a helicoid, so it has hardly been used. Since helicoids have the risk of oil, this one without a helicoid is safer to use. Includes the main body, case, and box. I am also selling this on other platforms, so in the event of simultaneous purchase, the first person to buy it will be given priority.