This jute wrap is a jute center cover for your dumbbell. It just slips around the inner part of the dumbbell and stays put there by Hook and Loop. When you are done training with the jute wrapped dumbbell you just take off the Jute Wrap and you still have your original dumbbell. This item works very well in getting that dog to hold the dumbbell in its mouth for training. After the dog has learned to keep that dumbbell in its mouth you just unhook the jute. There is nothing sharp to catch your dog's teeth on this Jute Wrap. This wrap is designed to fit our puppy and #1 dumbbells.