*Jack Hammer* na heavy power tool.
We dey call am *Demolition Hammer* or *Pneumatic Drill*.
*Wetin e dey do:*
- E dey break concrete, stone, road, wall, floor.
- Road workers dey use am to break tar, builders dey use am to scatter old building.
*How e work:*
E get heavy chisel wey dey hammer up and down very fast with strong pressure (air or electric). Once e touch concrete, e dey burst am.
*Types:*
1. *Electric Jack Hammer* - small one, you fit carry for hand (5-10kg)
2. *Pneumatic Jack Hammer* - big one, e dey use air compressor, for heavy road work