Camgeeker 11 Inch Articulating Magic Friction Arm for Hot Shoe Mounts to Work with LED Panel, DSLR Monitor, Mic 7ARM Durable construction with a locking control knob to release or engage the tensionDurable construction with a locking control knob to release or engage the tension This articulating arm simplifies the mounting and placemen Ergonomic design, one knob locks all positions Durable material, super steady and firm Min. 10.5 lbs stress and weight tested