STURME Aluminum D-Ring Locking Carabiner Clips Why STURME ? We specialized in designing and manufacturing high quality outdoor products. We strive to provide our customers with products and services which meet and even exceed their expectations. Features - Newly improved design 2017 - Strong and light, NEVER RUST - Made of ultra durable lightweight aircraft aluminum alloy - Fully tested locking mechanism, reliable Specification - Color: Silver - Material: Aluminum Alloy - Length: 3.15" - Width:1.65" - Diameter: 0.28" - Weight: 0.77ounce.