Using these snow chains is easy. First, take them out of the handy semi - rigid carrying case. Put on the plastic gloves provided. Then, follow the colour - coded and easy - to - follow instructions to install the chains on your tyres. The auto - locking device will help keep them in place. When using on snow or ice, drive carefully as the rhomboid - shaped running surface gives you a good grip. After use, remove the chains and store them back in the carrying case. To maintain them, keep them clean and dry. Check the chains regularly for any signs of wear and tear, especially the special twisted chain and the links on the running surface. If you notice any issues, it might be time to replace them.