I previously had done latch hook 40 years ago making some beautiful wool rugs. I ordered a new latch hook kit with acrylic yarn. The latch hook shredded about 50% of the yarn. I ordered a new name brand name hook and had the same problem. I ordered a 5 mesh and 3.75 mesh from another company, thinking that the 5 mesh in my 3.75 canvas would solve the problem if the 3.75 didn't work. It was better, but still over 30% got shredded. I ordered the 3.75 and 5 mesh from Color Crazy and all of a sudden I got a 99% success rate.
I thought maybe my technique had improved, since I hadn't done latch hook in so long, so I went back and used the 1st tools I had, and shredded 2 in a row. I won't use any other latch hooks now other than Color Crazy.