The JW® Hol-ee Roller® X extreme dog toy is a unique; thick natural rubber ball for dogs. It's tougher and thicker than the traditional Hol-ee Roller. This product is designed for tough dogs and tough chewers. Hol-ee Roller X has strategic patented honeycomb cutouts covering the ball so the dog can grab it and pick it up. It's also great for games of tug-of-war! The cut-outs can also be easily filled with treats or small toys for long-lasting boredom-busting fun! All JW pet products are intelligently designed with our commitment to a fun first while providing quality; non-toxic toys for your pets.