1"~2.5'' Metal Opening D-ring 1.Strip steel Made 2.Multiple sizes,colors,styles 3.Nickel Plated 4.Office, School, Project us 1"~2.5'' Metal Opening D-ring :Features:1. Easily attached and detached, harm-free from paper files2. Simple design, elegant looking.3. Stable structure. Not easy to scratch or dent.4. Durable, rust-resistant.5. High quality, competitively low price, fast delivery.6. Small ...