The 7 Arm Light Truck Spider bungee is made out of natural rubber and elastomeric material which makes these bungees stronger than standard bungees. A center hub distributes the tension of the chain evenly throughout and pulls out the slack which decreases how hard the chain hits the ground. This minimalizes the wear on the steel of the chain so you spend less money on tire chains which leaves you with more money to for play on those heavy snow days. | Quality Chain Corp 7 Arm Light Truck Spider Bungee