A jackhammer is a powerful handheld tool that rapidly pounds pavement, concrete, or rock to break it apart. Picture a construction worker holding what looks like a large drill pointed straight down at the street. The machine's metal tip hammers up and down dozens of times per second, creating enough force to crack through solid concrete like you might crack the hard shell of a walnut.

Jackhammers work using compressed air or electricity to drive a heavy piston that strikes the chisel-shaped bit repeatedly. The hammering creates an incredibly loud rattling sound you've probably heard near road construction, along with enough vibration that workers need to grip the handles tightly to control it. Operating a jackhammer requires significant strength and stamina because the tool can weigh 40 to 100 pounds and shakes violently the entire time it's running.

Before jackhammers were invented in the late 1800s, breaking up pavement or rock required workers to swing heavy sledgehammers for hours. The jackhammer transformed construction work by letting one person accomplish in minutes what used to take a whole crew hours or days to complete. Today, jackhammers remain essential for tearing up old roads, demolishing concrete walls, digging through rocky ground, and countless other construction jobs where something hard needs breaking.