Hammer Drills - Battlefield Equipment- what is a rotary hammer drill used for concrete construction equipment for sale ,Hammer Drills. The rotary hammer drill is an electric drill type dedicated to drilling holes in masonry or concrete. The rotary hammer drill is a percussion drill that uses a weight to create the impact force on the masonry bit. Equipment rentals are available at daily, weekly and monthly rates, which gives you the flexibility to rent that ...What is a concrete hammer drill? - Yahoo Search ResultsA rotary hammer drill is by far the best drill for concrete. A rotary hammer drill is specifically designed to smash holes through concrete with ease, in fact most rotary hammers are engineered for the optimal timing of the hammer action to take place.