Wide range of applications: 1" ball mount base for motorcycle, electric vehicles, and ATVs with a diameter of 1/4-20 on the rear-view mirror compatible with ram mount dual ball socket arms. Non-slip and durable: The diameter of this ball mount base is 1 inch, and the surface is covered with non-slip rubber, which is non-slip and durable. CNC MOULDING: CNC precision engraving, precise size, smooth surface, no scratching. High-quality material: Made of high-quality Stainless steel and TPU, it is non-slip, water-resistant, and does not rust. Easy installation: 1 inch ball mount base threaded rearview mirror is easy to install, easy to disassemble, and can be installed directly, saving time and effort.