Product review (5 stars): Fixed my disposal in 10 seconds!
My insinkerator disposal would hum but the blade wouldnt rotate. And then it would shut off and the breaker would switch off in order to not overheat the motor. I tried to turn the blades manually by using a wooden spoon and a heavy duty flat head screwdriver. Even though I could get the blades to turn, there was still something jammed perfectly under the blades which wouldnt allow the blades to spin at the flick of a switch.

I just used the JamBuster in the hole at the bottom of the disposal and twisted a few times back and forth until it could spin freely. So easy and so quick!!!!!