Using these jumpers is easy. Just take a jumper from the pack and connect it between the two neighboring 2.54mm male headers you want to link. That's it! For best results, make sure the headers are clean and dry before you attach the jumpers. When not in use, keep the jumpers in a cool, dry place to prevent any damage. If you notice any signs of wear or if the jumpers aren't working properly, it's time to replace them. These jumpers are simple to use and can greatly speed up your electrical projects.