This is a keychain using a carabiner. The carabiner, shackle, and double rings are all made of brass. *Only the moving part of the carabiner is made of iron. (Nickel-plated then brass-plated) It comes with three brass double rings. ■Materials Carabiner / Brass *Iron for the moving part Shackle / Brass Double ring / Brass ■Size Carabiner / Approximately 50mm in length Double ring / Brass Approximately 23mm in diameter, approximately 20mm inner diameter *Please retighten the screws periodically. *You can purchase without prior message. 【Discounts】 Discounts are not available for single item purchases, but for multiple purchases, the second item onwards will be discounted by 200 yen. Example) 2 items will be discounted by 200 yen from the total amount, 3 items will be discounted by 400 yen. If you wish to purchase multiple items, please comment on each sales page. We will create a dedicated page and contact you later.