"now that you told me your problem, lemme tell you about my big pickle"

those are auger tips from a drain clearing machine, commonly known as a "snake"

I used to work in a steelmill. we used an electric arc furnace to melt scrap steel down to be recast into bar products. our furnace transformer was supplied with 34,500 volts which was stepped down to approximately 600 volts AC and would pull about 54,000 amperes at the beginning of the melt. you can hear the charecteristic 60 hertz hum of the arc, sounds just like the electric furnace at the end of a melt cycle.