This is a brass keychain. It uses a large, impactful carabiner. The carabiner, shackle, and split rings are all made of brass. Three flat split rings are included. ■Materials Carabiner: Brass Shackle: Brass Split rings: Brass ■Size Carabiner: 80mm long Split rings: 24mm diameter *Please periodically tighten the shackle screw. *You can purchase without prior message. 【Discounts】 Discounts are not available for single item purchases, but for multiple purchases, the second item and beyond will be discounted by 200 yen. Example: 2 items total will be discounted by 200 yen, 3 items total 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.