Sunwin High Quality RJ45 modular CAT 5 5E Extender Plug Network Female to Female straight Coupler Ethernet Lan Cable Joiner Connector Adapter 10PCS 1.With The RJ-45 Coupler Connector Can Make a Network Extension Cord Out of Two Cat5E Network Patch Cables. Both Female RJ45 Connectors Accept One RJ-45 Plug, Allows To Plug Ethernet Cable into Both Sides 2.Future-proof Network Ethernet Lan RJ45 CAT5 5E Extender Plug; Allows You to Plug Ethernet Cables into Both Sides 3.RJ45 Female to Female Straight through Connector,great for extending ethernet connection by connecting two Cat 5 or Cat 5e make one longer cable 4.Cat5 RJ45 couplers extend the connection between two Ethernet patch cables 5.Can be used with or without the Keystone Latch.