5 Pair Black/Red Insulated 4mm Banana Plug Female Jack Socket Adapter Solder Type for Non-Insulated Male Banana Plug Cable Connector

The plastic jacket doesn't fit any male plug, it is way too thick...

Quality jacks and a good value.

Working well for my needs.Recommended.

These plugs require you to attach the wire with solder, but my solder would not stick. I thought the wire was attached but the connection was poor. I will have to buy another kind with a screw to tighten the wire.They were fine if you can get the solder to stick.

I expected some sort of crimp or ring to solder wires to, but neither male or female end uses anything I can solder to reliably. I have no idea what they meant to connect these, but it's entirely useless. These will go in the garbage while I now have to find something actually usable.Maybe I am missing the point, but any lack of documentation for intended use leaves me simply confused who could actually think this was a good idea.