After a long search in the nets I found this Bananas, and I have made a good choice. Very good quality, easy handling and excellent workmanship. I especially like that you can ensure the fixation on the rear screw and that the plugs are firmly seated. To use: First you have to rotate the rear color-coded screw out of the thread, then the cord - I -einführen a cross section of approximately 0.5 cm per cable / Bi-Wire. This can be very good on the small screws that allow even significant smaller cross sections, tighten. It is mirgeliefert while providing a suitable key - another plus point. Once you have inserted the banana plug into the socket entsprechnde, you can fix to the rear screw the plug.
Although the connectors are slightly more expensive than many others, they are in any case worth the money. Visually and qualitatively 5 Stars.