1. Armour AR-51B magic arm has double ballheads with 1/4”screw and locating pins on the ends individually for attaching cages and monitors etc.
2. It is made of aluminum alloy for lightweight and stability.
3. It has anti-skid rubber rings of increasing the friction of each of ballhead. A non-slip rubber pad prevents devices you connected from scratching.
4. The quick release wingnut with 1/4”& 3/8”threads is to loosen and tight the ballhead easily for adjusting the height and position you need.
5. There are also some 1/4”- 20 threaded holes for your convenience to mount other accessories.