as described in many reviews you get decent Keramikfasungen to connect MR16 or MR11 bulbs, such as LED spotlights. My versions - also not delivered from China - had no ferrule to protect the wire. The connecting cable is prepared for stripping, by stripping a just plugged end of the insulation can be stripped without tools and damage no individual wires of the strand. In addition to plugging of ferrules can be for example the 222-er clamp series of WAGO use (Google / Amazon to WAGO 222 search). It is also designed for the terminals of fine wire braid - and works fine when there is enough space for the yet thick terminal.
The cables are actually soft ("lapperig") recognized by the benefits of wire, but I can because no disadvantage. The delivery that I received does not smell disturbing.
So far I can not complain about the versions. Once inserted MR 16 LED bulbs are sufficiently firmly connected and not slip off of its own accord. I've got no loose contact or had any other damage during installation.
Conclusion: With proper handling emfpehlen fully stripped wire.
If necessary, as use idea:
I use them for the installation of 12V GU5.3 bulbs in recessed spotlights, which are supplied with GU10 socket. Furthermore, I use it for a path lighting, I bought inexpensive solar lights and stocked this GU5.3 versions with a 12V 1W Lamp.
Greeting Mangars