Easy Installation: Single Socket Arm with M8 x 1.25 male threaded steel post. allows for connection to any B size 1" RAM rubber ball; ball and socket technology allows for near-infinite adjustability. making it a convenient and hassle-free option for mounting your devices. High-quality materials: Single socket arm, high-quality mobile phone holder with 1-inch ball head adapter The body is made of 6061-T6 aluminum alloy, the surface is grade III hard anodized, durable, anti-corrosion and anti-rust, suitable for various harsh environments, the internal non-slip rubber gasket design has anti-slip and shock absorption functions. High-quality structure: FANAUE single socket arm for ensuring long-lasting and reliable performance Double ball joints provide multiple articulation points. The single socket arm connected with the 1-inch ball adapter can rotate 360°, easily adjust the device to horizontal or vertical direction, connect the phone clamp to assemble different mobile phone holders, connect other devices with 1-inch ball through this product, and freely match according to your needs. Compatible with RAM Mount B Size：This Single Socket Arm is compatible with RAM mount and any FANAUE B size 1 inch ball assembly,With a wide range of 25.4mm components, FANAUE offers a range of base, arm and bracket options to suit all your equipment mounting needs. Multipurpose use：Ideal for mounting smartphones, GPS devices, cameras, and other gadgets, the FANAUE Single Socket Arm is a versatile accessory for your vehicle, boat, bike, or any other mounting application. Lifetime Warranty：FANAUE aluminum arm lifetime warranty, if you have any problem, please feel free to contact us. If our FANAUE aluminum arm no longer performs as promised under normal use, we will happily replace it for you.