Testing drill concrete by Makita Rotary Hammer DHR171 

DHR171 18V LXT Brushless 17mm SDS Plus Rotary Hammer
2 mode operation; Rotation only or rotation and hammering
Vibration absorbing housing
1.2J* of impact energy
Compact and lightweight design
LED Job light
EPTA-Procedure 05/2009
Specifications
Shank type SDS plus
Capacities
- Concrete 17mm
- Steel 10mm
- Wood 13mm
No load speed 0-680rpm
Joules 1.2J
Overall dimensions 273mm
Net weight 2.1kg
Voltage 18V
*Overheat protection When the tool or battery is overheated, the tool stops automatically and the lamp blinks. In this case, let the tool and battery cool before turning the tool on again.
*Over discharge protection When the battery capacity is not enough, the tool stops automatically. In this case, remove the battery from the tool and charge the battery.
*Overload protection When the battery is operated in a manner that causes it to draw an abnormally high current, the tool automatically stops without any indication. In this situation, turn the tool off and stop the application that caused the tool to become overloaded.Then turn the tool on to restart