Premium Material: Heavty duty key rings are made of stainless steel, waterproof, rust & corrosion resistant. You can use the split circle rings in
Millennial Essentials 30pcs Flat Key Rings Key Chain Metal Split Ring (Round 1.25 inch Diameter), for Home Car Keys Organization, Lead Free Nickel
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304 Stainless Steel Rustproof Material. 12 Pack, Outer Diameter: 1.18 inch/30mm, Inner Diameter: 1 inch/25mm. Flat Round O Key Ring Clip, Flat Split
Wayliea 12 Pack Keychain Split Rings, Stainless Steel Flat Key Rings,Rustproof Metal Key Chain Rings for DIY Craft Attachment Dog Tag Home Car Keys