The boat, the ship, or the yacht machine, the rotating motion of the shaft in the form of the static electricity generated by the martial art, the body or the electrical system itself gives the wound. This damage in a short time is very understandable in time, metal equipment wear, electrical or electronic devices are affected, metal or aluminum boats cause damage to the craft to the drill. This static electricity generated in the shaft must be taken over the shaft with the shaft coals and thrown out with the grounding plate without harming the environment. There are specially blended coal and holders in our stock for miller which is 20mm den 180mm.