Premium material structure pass 1m drop test with no functional issue. Professional grade. Version is designed for drilling in whatever position the job demandsFull Function : 3 Functions (Hammer Drilling, Hammer, Chisel Adjust), 360° Rotatable Handle, Variable Speed Control with lock-on button, Depth Gauge, Shock Absorber, Replaceable Carbon Brush, Dust Collector... Got all you need at one timeDrilling Capacity: The max drilling diameter for concrete is 1 inch and for steel is 1/2 inch. This rotary hammer drill can reach 250-550 RPM no-load speed and 1600-3700 B-P-M max impact frequency. The SDS-MAX chuck allows for easy and secure bit changes to keep your project goingPackage Contains: 2 x point flat, 2 x Carbon brush 1 x Depth ruler, 1 x wrench.