It uses a percussion mechanism which rapidly breaks and excavates such heavy-minerals and bedrock.
Debris caused by excavation is discharged by being blown out by compressed air.
Since it does not use slurry, it does not require a mud water plant and uses fewer incidental facilities, resulting in easy carrying in and out.
| Application | Preventive pile | Steel pipe pile |
| EPS pile | Concrete pole foundation and so on | |
| Bedrock excavation work | Landslide prevention work |
