Installation is simple and convenient - after drilling,place the main body of the grommet directly into the hole,it can hide all the cables and wires. Effective cable and wire management, protect cable and wire,keep desk clean and tidy,it is also a good decoration. Flexible openings can accept multiple wires from any direction and can pass through any cable up to 1.5 inches (diameter). Made of ABS and soft glue,excellent comprehensive performance,wear ,durable and corrosion resistance. Packing contents:2pcs 2 inch black table top rivet, suitable for 2 inch (50mm) holes.