Foto4easy 50cm Photo Studio Lighting Light Stand Flexible Gooseneck Tube with Heavy Duty Clamp at The End & a 1/4" Male Thread at The Other End This is a 1/2 inch diameter, 20" goose neck with heavy duty clamp at one end for eattechment to tube or thick object. a 1/4" male thread at the other. This camera stand will clamp onto almost anything, and is designed to support a wide variety of cameras and photographic accessories , at many different angles. The Magic Clamp is perfect for close-up photography, to take along on vacations, in the car, hiking or whenever a third hand is needed. The dual positions allow you to clamp it and make two adjustments for close-up or copy work. Strong, goose neck arm with Clamp for attachment to tube or thick object.