I have a Doberman mix and an American Bulldog mix that do their best to destroy every toy I buy for them, they are very strong chewers and Nylabone is the ONLY brand I can buy for them without worrying about losing my money.
I tried other brands and their "durable" toys for "aggressive chewers" and they literally wouldn't even last more than a day. I've now started collecting all the hard Nylabone toys, and they are fantastic. I have had this one for a week and they love it! (Just watch where you walk, it's like stepping on a leggo.)