1 1/2" (38mm) inner diameter. Durable and reliable split key rings made of stainless steel and polished nickel. Easy to open but fitted tight to keep shape and ensure security. Available in packs of 5, 10, 25, 50, or 100. Better coordinate your office with the many size options offered from West Coast Paracord. West Coast Paracord's metal split key rings are heavy-duty, have an easy to open design and tight fit to ensure security. Use for jewelry making, crafting, office projects, presentations, organization and more. Available in 1 1/2", 1 1/4”, 1 1/8”, 1”, 7/8”, 3/4”, 5/8”, 1/2", and 12mm sized split keyrings and packs of 5, 10, 25, 50 and 100. Perfect for keychains, key ID tags, luggage tags, car keys, pet collar tags, EDC items, lanyards, and so much more.