Feature●Poses no electric hazards.●Centre water feed function reduces dust, and improves environment protection.●Can use 3", 4" and 5" pads.●Side exhaust keeps exhaust away from stone.●Plastic guard keeps hands from getting wet.Description 5" Gison Wet Air Sander / Polisher GPW-933A is a heavy duty air polisher most used for wet surface polishing of stone and concrete. The soft plastic shroud can prevent water from splashing all over.