Equipped with a 1/4"-20 thread compatible with many video products. Metal base and shaft for a stronger core, prevents breakage. 1"/25mm B-sized rubberized ball. Compatible with other  Our ball mount is equipped with a 1/4"-20 thread that is compatible with a wide variety of video products including, GoPro, Nikon, and more! Similar competitor products are primarily made out of plastic, which can easily break under heavy load. Our product is designed with a metal base for a stronger and more stable core to prevent breakage. Rubberized ball for easier repositioning. Our arm is compatible with Tackform Enterprise components, as well as RAM B-sized components and any other components that utilize a 1"/25mm ball.