NOTE: Before placing an order, please confirm that the maximum tabletop clamping thickness and maximum hose installation hole diameter of the product are what you need. Instruction: Easy to install, no tools required. There is an adjustable cross at the end of the clip that makes it easy to lock it securely to the table by hand. There is a screw next to the hole so that even a small gooseneck can be held securely in place. Application: This c shape desk clamp fits clamp or 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: Made of aluminum alloy, this clamp ensures lasting durability and is not easy to rust. The adjustable screw of the desktop mounting clip is designed to better securely mount your microphone on a desktop or other flat surface. There is a soft rubber pad on the table clamp base, that is non-slip and will protect your table from any scratches. Color: White; Material: Aluminum Alloy; Overall Size: 90 x 35 x 85 mm/3.25 x 1.38 x 3.35 inch (L*W*H); Clip Range: : 0 - 45 mm/0 - 1.77 inch; Mounting Clamp Hole Diameter: 12.5 mm/0.49 inch; Packing list: 1 x Desk Clamp.