P-graded, seeded-gel ceramic alumina abrasive and laser-cut, spiral, vacuum hole design maximizes dust extraction for clean work environment and less contamination, and delivers a cool, fast, consistent cut rate and longer life than any paper disc Unique fiber reinforced, flexible C-weight latex saturated backing provides 50% - 60% improvement in tear strength while retaining flexibility Water-based, non-pigmented stearate No-Fil coating and open coat provide maximum load resistance with no color transfer to work Exceptional choice for the most demanding medium grit vacuum sanding and finishing lightweight paper disc applications; hook and loop back for easy disc mounting and changing