1. 1/4 inch thread metal tripod screws with C-ring.
2. Made of metal material, solid and durable.
3. C-ring with flat head screwdriver slot, can drive it by coin or screwdriver.
4. Clear thread, uniform force, it is not easy to slip, easy to manually assemble and disassemble.
5. Anodized surface, glossy and flat surface, good workmanship, and is not easy to rust.
6. Can be used on any quick-release(QR) plates, tripods, monopods, telescopes, ball heads, lens collars, lens plates, camera and more.