Banana plugs with screw and hole for connection sharing

this banana plugs are unfortunately a bad design. If they are plugged in, they can be still as loose rotate back and forth, although the past Einsteckmechanismus tightly into the hole. At Banana Plug the spring sleeve is loosely pushed onto the plug and although the plug is inserted firmly in the hole, no fixed tight connection between the plug and the spring sleeve is made. Too bad.
Addendum: I have soldered one end of the spring sleeve, which is located near the terminal screw with the banana plugs. For a good result you should use a little soldering grease. If the connection screw is to be screwed in further, it is recommended to the screw hole in the plastic sleeve with a 4.2 to 4.5 mm drill to increase, so that the screw head does not rest on the sleeve but can be screwed down to the metal. Now it is a good plug.