Portable hydraulic hammer drills are excellent pieces of equipment for penetrating and chiseling even the hardest materials. The tools use hydraulic energy to strike a drill bit with high impact while rotating. Because they are lightweight and portable, they can be used for construction, mining, and renovations. Like most hydraulic hammer drills, these portable ones can also readjust the impact force and the speed of drilling, making them more adaptable to the different requirements of the job and work materials.