MAGNUM BLACK: Our magnum black rubber compound has a special additive that makes this our most durable and tear resistant rubber... perfect for the most powerful chewers. YAK CHEW HOLDER: The gear toy is perfect for holding smaller Yak Chews (2 oz size). Make your Yak Chews last longer! POWER CHEWER TOY: Ultra-durable gear-shaped chew toy and treat holder. Perfect for holding large treats like Milk Bones and Himalayan Yak Chews. REDUCES PROBLEM BEHAVIORS: Reduces problem chewing, helps reduce boredom, and relieves separation anxiety. DENTAL RIDGES: The ridges on the Gear Toy are stimulating for your dog while also cleaning your dog's teeth while chewing, helping prevent tooth decay and bad breath. NATURAL: Industrial Dog's all natural rubber compound is FDA compliant, non-toxic and biodegradable. It is sustainably harvested helping us reduce our carbon footprint. Animal and planet friendly! MADE IN USA: Designed and Manufactured in the USA!