Squidward Crushed by Spike Rollers / What Is the Purpose of This Machine? - why do they have this device in bikini bottom

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There's a reason Patrick has all of those licenses

I know this is rhetorical, but maybe wrecking balls don't work there due to all the friction from the water? So it's a building demolition tool. I could see that thing easily crumpling some cylinder made of metal like all the houses in the background.