6804A Concrete Polisher. Product Introduction. 6804A is a selfdriving concrete floor grinder for medium and large working areas. This is a powerful planetary counterrotating machine, with 4 multifunction reversible grinding discs and a highprecision gear box to ensure stable performance and excellent grinding results.
Electric pepper grinders should not be loud. Manual pepper grinders are not exempt from this concern, either. A highpitched squeak every time you turn the top may be funny the first few times, but it will wear thin fairly quickly. Does it offer several grinding levels? Most pepper grinders offer a way to change the grind from fine to coarse.