Exceptional motor protection, they are designed to prevent water penetration, even in case of direct jet, replaceable intake air filter on "click" can be changed without using any additional tools, robust switch with rubber protection, special mechanisem for simple and quick mounting of pokers, rubber buffers provide tool stability even on a slippery and dirty yard, and enable quick and roboust putting down on the ground; shoulder belt provides simple work and carrying along on construction site; user friendly innovative form; Sistema de uso amigable e innovativo.