HEIGHT ADJUSTABLE SPEAKER STAND - From 40 to 72 inches. Secured with sturdy metal safety locking pin HEAVY DUTY BUILD - Made from steel, reinforced joints, and anti-corrosion paint. Capacity is 132 lb. UNIVERSAL MOUNTING - 35mm pole diameter mounting option that fit most PA speakers & studio monitors. Not expensive like - Sanus, Atlantic, VideoSecu, PERLESMITH, Mount-It!, Kanto, VIVO, Monoprice, Definitive Technology, OmniMount LOCKING SAFETY PIN - Knob-style tension locking system & sturdy metal pin for safe raise & lowering.