Tough-Ball with M8-1.25 x 10mm Threaded StudWhy call it tough? Because this latest addition to the RAM product line has steel inside and out. The seamless transition between RAM versatility and steel durability allows for a multitude of real world, and out of this world, applications. With so many of the things we use incorporating threads and fasteners, there really is no limit to the number of uses youll find for the RAM Tough-Ball.The RAP-379U-M812510 consists of a 1.5″ diameter rubber ball, connected to a M8-1.25 X 10MM male threaded post.Specifications:Metric Thread Diameter and Pitch Options: M8-1.25 X 10MMMaterial: High Strength Composite & SteelBall Size: C Size 1.5″ Rubber BallNote: The “U” in the part number reflects product packaged in poly bag