1. Made of metal material, solid and durable. 2. Precision made 1/4 inch to 3/8 inch metal screws, silver plated, international standard. 3. Help you gain more rig combination possibility and freedom in your photo shooting. 4. This is a universal adapter spigot stud for the studio use, on video system like camera cage / shoulder rig / tripod / socket studio / lighting equipment / LED panel / action cameras and more! 5. Lightweight and portable, easy for carry and storage.