Keystone Category 6 110 Punch down style connectors offer an economical choice the popular 110 punch down style connection system. Each jack is color coded for both the EIA/TIA568 A and B standards for compatibility with any installation. We also offer a selection of jack colors to fit individual installations. A shielded version is also available to maximum protection from EMI/RFI interference. By utilizing fully shielded jacks and connecting hardware, you can reduce the effects of interference on the network data transmissions.