Opening that can easily be split apart to accept larger plugs or connectors.The CHC series provides grommet openings that securely fit your cable size needs. High-end metal solution (zinc die casting) for greater durability than plastic grommets. CHC-S22 and CHC-S26 come with a guide that helps keep the parts aligned when being reassembled.Larger split cable grommet LS-50S-S is also available.WARNING: This product can expose you to 1,3-butadiene, cadmium, chromium, lead, nickel, which are known to the State of California to cause cancer and birth defects or other reproductive harm. For more information, go to www.P65WARNINGs.ca.gov.