The F3 speaker stand is the perfect companion to Alto professional speakers. With foldable design and durable aluminum construction, each F3 speaker stand is ready for life of constant setup and breakdown, indoors or out. Their aluminum bodies make F3 speaker stands lightweight and strong. Each F3 speaker stand comes equipped with large, ergonomic knobs for easy adjustment and breakdown and each has steel safety pin that ensures speaker will stay at the height you set. F3 speaker stands are compatible will virtually any pole-mountable speaker that has standard 35mm pole socket.