SmallRig Articulating Arm (9.8in) 2066B is equipped with 1/4?-20 screws on both ends respectively. Thus, it could attach monitor via the 1/4?-20 screw on the one end and attach accessories with 1/4?-20 threaded holes on the other end, like NATO Rail 1973. Mounted with 1/4?-20 screw is a rubber cushion that protects monitors from scratches and helps to lock the monitor tighter. It features an ergonomic wingnut for great convenience that could help to adjust any angles based on your needs. Note: Maximum payload: 1.5kg Compatibility: Universal In the Box: 1 x 9.8in Articulating Arm 2066B Specifications: Product Dimensions: 140 x 60 x 25mm Package Dimensions: 180 x 100 x 40mm Product Weight: 225g?5g Package Weight: 265g?5g Material(s): Aluminum Alloy, Stainless Steel