Two jackhammers with different pitch drilling concrete on the street in New York City, close perspective
Drill parade of marching military men, boots on concrete floor indoors. Large group marching.
Roadwork with grinding machine noise, some workers talking
Exterior of construction site with drilling rig - Rotary Bauer BG 28-H, some background noise and beeps
Construction site, medium distant, Rotary Bauer BG-20 drill, idle, working, shaking, background machines.