This is a very sturdy, USA made twin ukulele clamp, designed to be attached to a microphone or music stand's central tube. It can be clamped onto any metal tube or pipe up to 1 inch in diameter, using the easy to use thumb screw mechanism. The two hangers have a protective coating to avoid any scraping of your instrument, and the whole thing comes attached to a solid little tray, presumably for leaving your tuner on or similarly compact gizmo that you might need on stage.