Basic Model For those not requiring through-the-tool water feed (who prefer to use a hose or spray bottle). Achieves the ultimate in swirl-free finishes. Wet sanding reduces airborne dust, improving air quality of workplace. Overskirt shroud is standard on all models, to control water splash. Accepts diamond abrasive discs as well as microfinishing film and conventional wet discs. Includes non-vacuum, hook-face, short nap, 3/8" (10 mm) thick sanding pad (54327). 3/16" (5 mm) Diameter Random Orbit for swirl-free finishes.