Cat 6 keystone jacks for 23 to 26-gauge stranded and solid cables meet the international standard ISO/IEC 11801 and the ANSI/TIA-568.2-D requirements. Cat 6 Shielded RJ45 110 Punch Down ethernet Keystone Jack is suitable for 23 gauge to 26 gauge stranded and solid wires. It doesn’t require any punch down tool to make IDC contact.