A shame to sell such a thing!

I bought the set of three red heads (technically identical to the orange model, says the vendor) and I could not mow over 30 m².
First test: I hit a shot to lengthen the wire, on grass, on a soft ground ...
I hear crackling like a but I figure it must be the thread that scrapes the hides ...
I mow about 10 sqm, I give a blow: the thread goes ....
I tell myself that this is a demo thread, I'll charge ....
I disconnect my head ... Sounds a puzzle noise inside ....
I open with a screwdriver (not practical system at all), everything is crumbling inside.
I climb another head, I advance the wire, I 20m² I advance the wire ... crack !!!
I go up the third and final head, I advance the thread: crack !! 0 m² shorn.
This stew unnamed is made of a plastic BREAKING instead of a slightly flexible plastic, like all other heads trimmer. I said that the outside temperature was 18 ° C, there was no reason why it breaks.

I thought I was getting a good deal, it was a good idea to have 3 heads to avoid having to reload when one is empty, I have made myself !!!
That is why they are sold by 2, 3, 4, 5 ... to dump a stock of non-compliant products

Look at the clasped and especially pictures: do not buy !!!