Anti-slip and shockproof: TPU overmolded M10 ball head features an ergonomic design that securely fits the double socket arm with a tight, stable connection that resists loosening. The soft and elastic ball head base effectively absorbs impact, ensuring reliable performance even at high speeds on rough terrain. The ball head allows 360° rotation, enabling flexible horizontal and vertical adjustment of the phone holder for optimal viewing angles. Compatible with RAM brackets: 1-inch ball head adapter with M10x1.25 studs fits RAM mounting B-size double socket arms and motorcycle phone holders. Supports any mounting accessory with a 1-inch ball pattern. The 1-inch ball base fits M10x1.25 threaded posts on motorcycle rearview mirrors, electric vehicles, ATVs, and similar devices. Installation size: M10x1.25 ball head includes a 1-inch TPU ball and an M10x1.25 threaded steel post. Ball head diameter is 25mm. The threaded post connects to standard female threads on cameras, camcorders, and other devices. Ensure the threaded hole matches M10x1.25 specifications for proper installation. Color: Black. Material: Stainless steel. Package Contents: 2 x Ball Head. Note: Lighting and display differences may cause slight color variations between the image and actual item. Measurement tolerance: +/- 1-3cm.