This manufacturer should be sued. This product is extremely dangerous. Idiots who do this do NOT check how sharp the teeth are. This is the same as running the point of a sharp knife across a dog's back. I didn't check how sharp it was before using the tool. After the first gentle pass onto my dog's (140 lb Cane Corso) back, he screamed. On examination, this debris cut his back at the point where it made contact with the skin. I was amazed because I didn't even really apply any pressure. Attention buyers. If it had been a local seller I would have given them a painful physical check. Seriously, AMAZON SHOULD BAN THIS DANGEROUS TOOL