TRENDnetCat6 Keystone Jack – 50-Pack, 90° Angle Termination, Colour-Coded Labelling for T568B Wiring, TC-K50C6

It's a piece of metal with holes in it. You put it in the rack and fit keystone modules in it.

Took a while to find the easy method of putting these together.My top tip is to strip your cable, removing the centre core and cord. Push through.As this point separate the bundles into the four colours and place approximately where they should be according to the colour chart on the side.Untwist the pairs as required and simply push into the connectors.Once done, clip in the upper section and push down until it clicks.Cable tie up the end, clip excess cable and tie.. job done.Not had one fail yet

I'm upgrading from an 8 port patch panel to a 24. Rather than go with a punch down patch panel again, I decided to go with a 24 port keystone one instead.In theory, these keystones should have been perfect for the job, but they're a nightmare to use.The instructions are on the bag itself, though a large yellow sticker was placed over them. Not a major problem as they're easy to put together, but a little annoying.From a time point of view, these are quick to put together and setup, but you will end up spending much more time in the long run.I clipped it together several times and every time I clicked it together, it cut one of the cables by mistake. First it was pin 3, next time it 4, then 1, then 5 and 8 (these cables worked perfectly when attached to my 8 port patch panel, so the problem is definitely at this end).When you're punching pins in for an RJ45 module, you can quickly correct the pin in question, but with these you need to pull them all out and start the whole thing again, which means you need to break it all apart again. Then when you do it again, a different pin stops working.I wasted an hour doing this and lost three or four inches of cable too.They're cheap and plasticy too and during one of the many times I had to lift up the grip, the plastic clip broke off.I really can't recommend these.