The unique and simple scissor-action clamp is strong enough to hold the smart phone securely through earthquake-shaking sets. The high friction yet gentle clamp posts will accommodate a wide variety of smart phones - even in their protective cases - while giving clear access to touch screens, buttons and ports. The Smartphone Holder is packaged with a discreet tube clamp that will securely attach to any 5/8 inch. to 1 inch. diameter stand tube (think cymbal, music or mic stand). To complete the package there's a 6 inch. gooseneck to position the holder ergonomically - in just the right spot for viewing, texting, editing, recording or jamming.