For finessing operations with Polarstar and Iridium SR3, SR5 and SR7 abrasives. This product dispenses quickly and neatly an appropriate amount of liquid to the surface. By using the finessing damper you'll get less excess splashing and wiping off and it helps to avoid skin contact with harmful liquids. Remember to clean the disc inbetween sanding operations, by gently running the disc against the damper head.