- For attaching a flash unit with umbrella to the tripod ,- With spigot adapter for use on tripod sockets A 1/4 (6.4 mm) ,- Without adapter can be used for larger diameters up to 1.5 cm ,- Studio umbrella is attached to the insert hole with a spring, suitable for all common umbrella diameters ,- Joint for inclining the flash and umbrella by 90° in both directions ,- Standard flash rail with locking screw for secure fixing ,- Suitable for all stands up to 1.5 cm - Thread/Connection: 1/4 (6.4 mm) ,- Tripod Socket: 6.4 mm ,- Colour: Black 2 years legal warranty only