excellent performance the hammer drill with a no-load rotation speed of 0-1400 rpm and 2.1j striking energy for maximum drilling performance. drilling capacity: 22 mm for concrete, 28 mm for wood, 13 mm for steel. [(4 in 1 device)] the impact drill is equipped with a rotary switch that allows you to switch easily and freely from hammer to drill, chisel and hammer drill. suitable for drilling, chiselling and stripping concrete, metal, stone and other scenes. long service life: demolition hammer equipped with brushless motors for reduced maintenance and extended operating time. large ventilation design allows for more efficient heat dissipation and higher overload capacity, sturdy construction extends tool life. [(high efficiency work)] sds-plus allows for quick and tool-free changing of different drill bits and chisels, and compact design, small size, lightweight and easy to use, perfect for home installation and maintenance. comes with: 1 x 18v cordless hammer drill, 4 x sds-plus drill bits (6 x 110 / 8 x 160 / 10 x 160 / 12 x 160 mm), 1 x 4.0ah li-ion battery, 1 x 2a charger, 1 x diy box, 1 x user manual.