This c shape desk clamp fits clamp0r desk-base lamps which easily fits on the bottom of each lamp and fastens tightly to any table. Widely applied for home, office, stage, studio, or broadcast. Add lamp placement versatility or add a second mount for use in other rooms. Advantage 1. Made of plastic is lightweight and easy to carry. 2. The adjustable screw of the desktop mounting clip is designed to better mount your clamp holder on a desktop or other flat surface. 3. There are three mounting holes, horizontal and vertical can be used, very convenient. Instruction Easy to install, no tools required. There is an adjustable screw at the end of the clip that makes it easy to lock it securely to the table by hand. NOTE Before placing an order, please confirm that the maximum tabletop clamping thickness and maximum hose installation hole diameter of the product is what you need.