The Hol-ee Mol-ee Extreme 5 is the relentless version of the Hol-ee Roller. The Hol-ee Mol-ee Extreme Ball is Virtually indestructible toy for heavy-chewing dogs. This toy is made to endure even the most exuberant chomping. This 100% all natural rubber dog toy has square cut outs that can be as a treat ball, a chew toy, or for games, all enjoyable for your pet. This is the toy for your toughest chewers. For medium, large and giant breeds.