SmallRig Articulating Arm with Dual Ball Heads (1/4?-20 Screw and ARRI Locating Screw) 2115 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. 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 is interchangeable with other SmallRig ball head parts such as 2132, 2134, 2211, 2114 for different mounting configurations. Compatibility: Universal Package Includes: 1 x Articulating Arm 1 x Hex Spanner Product Dimensions: 140.5 x 28 x 57.5mm Package Dimensions: 155 x 80 x 40mm Net Weight: 157g Package Weight: 195g Material(s): Aluminum Alloy, Stainless Steel