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The KB850M Accessory Boom Arm by Hamilton Stands is a non-telescoping boom arm for use with the KB840 combination boom stand or any US 5/8" threaded microphone stand. It can be used in various environments for applications such as, live stage, theater, houses of worship, schools, rehearsals, and more. It features metal mounting threads, a T-handle adjustment for secure boom positioning, and an adjustable fixed length boom through the boom clamp.