The CPSC has announced a recall of these dog leashes. They were sold at Family Dollar Stores from September 2007 to August 2008. The metal clasp on the leash that attaches to the animal's collar can bend or break and detach from the collar. The reports of injuries at this point in time appear to be mild. That said, if you have one of these leashes get rid of it or send it back for a refund.
I had a case involving a defective retractable dog leash several years ago, and the hook portion of the clasp straightened out and it came flying back into my client's eye! She became legally blind in the eye and it was obviously a horrific experience for her. The leash had been purchased at a local dollar store, and was brand new when used. I had the hook analyzed by a metallurgist who determined that it was made of a very cheap pot metal, and for just a few cents more, the manufacturer could have made the hook extremely strong and durable. That leash was made in China.
At the time of that case, in my opinion, the best leashes were made by Flexi Leash out of Germany. Their hooks and other materials used in their leashes were of good quality, and their leashes had weight limits listed as well. I currently do not have a dog, so I have been out of the dog leash market. There now may be other leashes of equal or better quality. Check the internet and do some research before you purchase.