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On balance they are pretty good, some install parts have to be sourced elsewhere but on the whole they offer a turnkey solution for many installers.
RJ45 Coupler Female to Female, LAN Connector, Extender Adapter for Ethernet Cable, Network Cable, Patch Cable
RJ45 coupler for easy extension of two LAN cables without having to re-route or replace a cable.
This LAN connector consists of two female RJ45 sockets and is suitable for all cables with RJ45 plugs, such as network cables, LAN cables, ethernet cables, internet cables and patch cables.
This connector is compatible with ethernet cables of the category Cat5, Cat6, Cat7 and Cat8.
Optimal shielding provides constant signal transmission with less signal interference or loss
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