This ENEACRO model quotes 7 joules of impact energy, stated plainly in joules, from a 12.5 amp motor. Joules are the number that predicts concrete speed, because they measure how hard each piston stroke hits the bit, and 7 J puts the tool in the range that handles 3/4 inch anchor holes and 1-1/4 inch core bits without grinding to a stop.
It has three modes: drill only for wood and steel, hammer drill for concrete and chisel for light demolition. The tradeoff is the three-mode design, which lacks the fourth chisel-angle lock found on some rivals, so you cannot fix the chisel at a set angle. Against the ENEACRO ENRH3201 in this list, which is rated at 13 amps and 5.5 foot-pounds (about 7.5 J), the two land within a few percent on blow energy despite the amp gap, a good example of why amps are a poor guide.
The 360 degree adjustable side handle and anti-vibration design help with fatigue, and a safety clutch slips if the bit binds on rebar. Plan on greasing the chuck and clearing dust from the vents after each concrete job.
What works
- 7 J is stated plainly in joules, the unit that predicts concrete speed
- Adjustable 360 degree side handle improves control and comfort
- Safety clutch slips when a bit binds on rebar
- Drill-only mode doubles as a heavy-duty wood and steel drill
Watch out for
- Three modes, so no fixed chisel angle lock, and a heavier body than the 9 amp units
- Heavier than the 9 amp units in this roundup
- Corded tool, so cord length and outlet access limit reach
Spec sheet
- Motor
- 12.5 amp corded
- Impact energy
- 7 J (about 5.2 ft-lbs)
- Max concrete hole
- 1-1/4 in
- Modes
- Drill, hammer drill, chisel
- Handle
- 360 degree adjustable side handle
- Safety
- Safety clutch





