I honestly have no idea if this light string repair tool actually works. According to the catalog text it can fix your broken strands of Christmas lights using some sort of heathen voodoo:
It sends an electrical pulse through the string and repairs problems associated with defective shunts, often the cause when an entire section of lights goes out...Also includes voltage detector with sound, bulb/fuse tester and bulb remover.unlit
The price of happy holidays? Just $24.95 plus shipping.
[via Oh Gizmo! ]