Material-Triangle split ring hook machined from 100% stainless steel for firmness and durability,plastic covers machined from high-quality abs,plastic cap covers prevent scratches from the metal ring | Easy to Install-Plug in the triangle ring first then put the cap on,the camera strap is securely attached to the camera | Function-Helps a wider neck strap neck, shoulder attach to the camera small eyelet | Specification- Compatible with cameras and rangefinders with small eyelet. It is suitable for most neck, shoulder, and wrist straps ≤ 11mm in width | Widely Compatible-Compatible with fujifilm, sony, leica, canon, nikon, olympus, panasonic, and pentax slr rf mirrorless point & shoot compact cameras. note: not suitable for heavy dslr cameras