InstaChain 12 Chain Automatic Snow Chain
Chain up instantly with Insta-Chain, the automatic tire chains / automatic snow chains with the difference.
Insta-Chain automatic chains operate by simply flipping the switch mounted on the vehicle dashboard providing "Traction On Demand".
When hazardous conditions of ice and snow threaten your safety, just flip a switch and your Insta-Chain Automatic Snow Chains go to work. You never have to stop your vehicle to "chain up" again! You don't even have to leave the driver's seat. Traction is instant and fully automatic! And Insta-Chain Automatic Snow Chains meet all states DOT requirements.
More information: http://www.worktruck-outfitters.com/automatic-tire-chains/insta-chain-automatic-snow-chains-12-chain-system.html