The Hardin 4″ granite polishing package is the ideal set of tools for polishing granite and stone surfaces. This package includes the 4″ variable speed wet polisher and a complete set of stone diamond polishing pads up to 3000 grit. The WVGRIN is a low rpm, variable speed (1,000 – 4,000) water feed angle grinder. This tool is required when polishing with diamond tools that require the use of water and low RPM’s This unit is equipped with an 800 watt 8 amp motor and features a variable speed dial located at the rear of the grinder