| Yes, something comparable does exist. It's called the "Heavyrope", and is available in a variety of thickness, from around the size of a dime to around the size of a quarter. Each of these ropes also weigh a different amount, from one pound up to an immense six pounds. It's made of a thick vulcanized rubber case filled with a sand-like substance. From what I've seen, unless you get a hacksaw and go to town on it, it's not going to break for anything. Hope that helps you! | 
