This is our latest Dual Threaded Rectangular Bar Arm Mount capable of holding two arms on one mount allowing you hold a smartphone and an option GoPro other device on the same arm. The kit here comes with one Magic Arm only. Additional arms and arm types are sold separately and can be purchased separately. The Magic Arm is made from Aluminum Alloy and is one of the best on the market. It is a very versatile arm offering 360° adjustability and viewing angles. The Magic Arm comes with two male 1/4'-20 ends with an extra adapter offering one Side to become a female 1/4"-20 internally threaded end to work with male 1/4"--20 threaded ends you may have to want to use with. The aluminum alloy smartphone holder is made from aluminum alloy and offers wide range of adjustability for most smartphones on the market regardless of width and thickness. The width and thickness are mentioned din the image attached so please check. The knob on the side only needs to be turned and adjusted once and after your smartphone can easily be inserted and removed by just flipping the turning knob on the side. The aluminum alloy smartphone holder comes with removable and adjustable legs. Legs can be adjusted to 3 different heights to suite various smartphones so whether your smartphone is tall, short,narrow,wide,thin or thick with an extra thick extended battery pack this will hold it. For video bloggers this also comes with a cold shoe mount on side and an extra 1/4"-20 internally threaded female adapter for mounting extra devices on it if needed. The kit also includes a GoPro adapter to allow you mount GoPro action cameras on it as well. This Bar Arm Kit works on the bar arm mounts on the Jeep Wranglers,Dodge Ram Trucks, ProMaster Vans, and Mercedes Sprinter Vans as well.