Indasa Rhynogrip RedLine 6" 6-Hole Vacuum Sanding Discs (630 Series) are perfect for heavy sanding, prep sanding, fine sanding, blending, rectifying, and micro-finishing before polishing. Featuring a velour grip backing and 6-hole configuration, these discs are compatible with hook and loop style backup pads for dust extraction when used with a vacuum sander. Indasa's RedLine series, their premium abrasive line, uses high-quality aluminum oxide mineral grains and a lubricant coating to resist clogging. Available in a wide grit selection, these discs offer high cutting power, excellent stock removal, flexibility, a consistent finish, and a long working life. The Indasa 630 Series is available in grits from 36 to 2,000 and is sold in boxes of 50 discs.