4XEM's Cat5e 110 Style Punch Down Keystone Jacks are perfect for any UTP Ethernet environment. Ideal for Cat5e cabling environments, the jack also meets UL-certified ANSI/TIA/EIA-568-A-B. The patterned printed circuit board construction is designed to meet CAT5E requirements, and is fully compliant with EIA/TIA CAT5E connecting hardware specifications. This Keystone fits into any conventional face plate, outlet box, or panel. It also features dual-color coded labeling made for both 568A & 568B wiring schemes.