SmallRig Magic Arm with Double Ballheads Arri locating Pins and 1/4’’ Screw – 2115C is compatible with a wide range of devices such as field monitor, LED light, sound gear, etc., this arm has a load capacity of up to 5 kg/11 lb. It can be used to mount an accessory on your camera rig firmly and flexibly. Each end features a tightening thumbwheel for easy accessory mounting, with rubber pads protecting the equipment from scuffing. Use the included small hex key to further tighten the thumbwheel if a heavy device is attached. Compared to a single 3/8”-16 screw, the ARRI locating screw is much safer with two anti-rotation pins. Both ball heads are secured using the single, large thumb lever.