The metal spring is a “shock absorber” and is used as a buffer process, this design can ensure the safety of the dog bungee high place. Dog toys for aggressive chewers hold up to 600 pounds, Dog bungee tug toy rope is made of indestructible outdoor bungee rope. You never worry about the rope toy breakage due to over-stretching 16ft nylon rope has been rigorously quality tested, holds up to 1100 lbs.you can toss the bungee cord over the strong tree limb, loop it, and pull it. Of course, you can also hang the dog toys for aggressive chewers from a tree branch, wood beam, patio, and other things that have some height for support. You can adjust the height of the dog rope toys to make this interactive spring pole toy more challenging for your furry friends The outdoor toys with 2pcs replaceable rope ball dog toys, you can replace use them. Made of high-quality 100% cotton, which can wipe off the tartar and make the dog's teeth healthier.