Universal Subwoofer Speaker Pole Extender - Heavy Duty Arm Stand w/ Telescoping Height Adjustable 33.5&rdquo; to 51.0&rdquo; Locking Safety PIN & 35mm Compatible Insert On-Stage or In-Studio Use - Pyle PSTND3 ARM STAND HOLDER: Pyle boom arm speaker stand connects tripod legs for increased stability. The speaker pole extender collapse easily to fit inside the bag for easy transportation. It can also hold speakers of up to 100 lbs. firmly and steadily 33.5 - 51.0 HEIGHT ADJUSTABLE: It features quick and easy telescoping height adjustment ranging from 33.5 to 51.0 inches high. It is secured with a sturdy safety pin and constructed with rugged and durable metal for long-term use 35mm COMPATIBLE INSERT: Pyle 33.5 speaker pole extender works with all speakers with 35mm compatible insert. The ideal heavy-duty audio stand for loud music, pa speakers, studio monitor and used with speaker cabinets for elevated top mounting LOCKING SAFETY PIN: Built-in with knob style tension locking and safety pin for secure placement of a speaker attached to the stand. It also supports the weight of the speaker stand and prevents it from collapsing ON-STAGE OR IN-STUDIO USE: Pyle provides safe and reliable speaker placement with reinforced 35mm (1.375'') engineered tubing perfect for on-stage or in-studio use. It only weighs 2.09 lbs. with a glossy black finish Designed to mount speaker onto subwoofer cabinet with top mount hole Adjusts to 58" maximum height 35mm diameter tubing with 100 lbs. load capacity Safety pin for maximum strength and security