What you're looking at is the Super Knuckle Ball for Convi Clamp and Cheese Plate, a robust and versatile accessory designed to enhance your photography or filming setup. Crafted by the reputable brand Kupo, this product is known for its high-quality construction and reliable performance. This sturdy round plate features both 3/8"" and 1/4"" holes, making it perfectly compatible with a Convi Clamp or a standard cheese plate. The Super Knuckle Ball is designed to provide a secure and stable mounting solution for your cameras, lights, and other essential equipment, ensuring your gear stays in place during your creative process. The package includes M5 screws along with 3/8"" and 1/4"" nuts and bolts, all designed to fit seamlessly into the 1"" center-to-center holes. This makes connecting to the super knuckle system a breeze, saving you time and effort during setup.