A jackhammer is a pneumatic tool that breaks up concrete and rock. It is also called a pneumatic drill or a breaker. It is heavy, loud, and powerful. The tool has a chisel or a point that hammers into the surface. The operator holds the handles and applies downward pressure. The tool does the rest. It is used to demolish concrete slabs, break rock, and dig trenches in hard ground. It is one of the most punishing tools on a construction site.

Jackhammers come in several sizes. A small electric breaker weighs 30 to 40 pounds and is used for light demolition. A medium pneumatic jackhammer weighs 60 to 80 pounds and is used for concrete and asphalt. A large breaker weighs over 100 pounds and is mounted on a machine or a rig. The tool is powered by compressed air, electricity, or hydraulics. The air compressor is often a separate unit. The hose must be rated for the pressure. The chisel must be sharp and the right shape for the material.

Jackhammer work is physically demanding. The vibration travels through the operator's hands and arms. Prolonged exposure can cause vibration white finger, a circulatory condition. Hearing protection is required because the noise can exceed 100 decibels. Safety glasses, steel-toed boots, and gloves are essential. The tool can kick back and cause injury. The work is slow and exhausting. But without it, breaking concrete would be even slower. The jackhammer is a brute. It is also a necessity.