You can find replacement jumper cable clamps at most automotive parts stores or warehouses. You may also be able to find replacement clamps at a home improvement store, or in the automotive or home improvement section of your local department stores. Over time, the clamps on your jumper cables may wear out, which means they need to be replaced. However, you may also find that it’s more expensive to replace the jumper cable clamps than it is to buy a new jumper cable set. This situation will be common if you have a low priced set of jumper cables. It may be worth it to replace the jumper cable clamps on higher end jumper cables. Zip’s Jumper Cable Clamps can help you find some.
For more info, see How to Jump Start a Car Using Battery Jumper Cables