Absolute rubbish. My 7 months old puppy wripped the ear off and had half he tummy wripped open after 5 minutes. Very dangerous. Not worth the money at all. I emailed the company and was offered 20 percent discount if I buy another one. Why on earth would I want another one?! It says risk free money back guarantee on their website, this is not true. Total false advertising, I will be taking this further because I don’t like being scammed.