SPIKES-SPIDER Winter Snow Tire Traction Assist Device MODEL 92.021 Made in Switzerland. Consult official website for more information to confirm size will work for your tires. Bundle includes two wheel holders with front and back plates, install tools, manuals, canvas carry bag. Used, excellent condition. I do not have any further information about this set.  I was unable to learn more online. As a result, this item is SOLD AS IS NO RETURNS. Shipped with FedEx.