The main functions of rotary hammers are the percussion drilling of holes in masonry, in stone and concrete. The existing two handles simplify the work, one of which is capable of rotating 360 degrees. The dust cap perfectly fulfills its function, and various modes (simple drilling, hammer drilling, chiselling) ensure high-quality and quick work. Depth limiter and power button lock make working with the Whirlwind more convenient. For the advantages and disadvantages of these tools, see the reviews of builders and home masters.