Jumpers are an easy to implement, inexpensive way to drastically lower the resistance on your fence - this will allow your charger to hit harder. Remember, resistance zaps the power from your electric fence charger. Jumpers are used at the corner post of your fence to 'jump' the power from wire to wire. This effect is most pronounced on longer fences, or if poor quality wire is used. Matter of fact, if you have an existing fence with poor quality wire, using jumpers can cheaply and quickly increase the shock to the animal. Also, the more strands the better if you are putting jumpers on your fence. Check the interactive chart above, then check 'jumpers' and see the difference!