Sturdy and durable: The desk grommets are made of high quality zinc alloy, durable, rustproof and waterproof, keep the desk clean. The cable hole covers can also be used in outdoor kitchens.Thickened brush: cable guide designed with finely cut flexible plastic openings. Thick brushes prevent wires from being cut, wear over time, or damage the circuit.Easy Installation: Easy to store with wires, computer holes can be moved. If there is a lot of wire, use a table lock ring without a cover.Accurate Card Position: The metal wire drawing table grommet reinforces the card position to prevent the inner cover and fixed base from slipping. The computer desk hole cover can be locked with a slight twist left or right, ideal for kitchen wires, water pipes, washing machines and bathrooms.Thickened non-slip ribs: Special thickened non-slip ribs are placed on the table hole cover to prevent the junction box from shaking. Table hole cables are suitable for desks, workbenches, counters desks, school desks and school entertainment systems.