1. Made of metal material, solid and durable.

 
2. 3/8 inch male to 1/4 inch female for use with mic stands with 1/4 inch threads.
3. Use for tripod camera screw and mic stands.
4. Compatible to lens plate button heads, Arca Swiss type button heads.
5. Precision metal screws, silver plated, standard tripod mounting thread
6. Can connect tripod, shoulder rig, lightstand, micro-film equipment, camera cage and others