Rotatable : The cup holder is rotatable, opened when in use, rotate into under table when not in use. Save space with compact design that you can put it on side of table or under your desk. Fits Most Drinking Cup: You can use it to place your coffee cup, juice, wine, beer, beverage cans, sports water bottle and other kinds of cups. The drinking cup diameter need to be less than 3.34 inches. Adjustable Clip: The Clip of cup holder is equipped with soft material silicone pad, it 't scratch mounting , better protection for your furniture. Suitable for table thickness 0.2inches - 1.73inches. Easy to Install & Use: The cup holder is equipped with knob fastening screw, It can be easily installed on any flat vertical . Just put cup holder on edge of your table, twisting knob screw tighten up thickness until it cannot be screwed, now you can place your cup. Wide Applications: The under table cup can be installed on anywhere, table, gaming desk, cupboard, beach table, beach chair and wheelchair. Easily adjust to hold almost any cups, drinks, cans, mugs or other bottles. Colour:Black Material:ABS Package Contents: 1 x Cup holder Only above package content, other products are not included. Note: Light reflection and different displays may cause color of item in picture a little different from real thing. The measurement allowed error is +/- 1-3cm.