Norton Speedgrip Disc 178mm x NH P120 Grit - 5 Pack. These abrasive discs are designed for all hook and loop sanding tools and machines, including random orbital and rotary sanders. Applications include stripping and preparing primed and painted surfaces for finishing, sanding of plastics, fibreglass and composites, bare wood sanding and body filler compounds. The industrys highest performing and broadest selection of paper discs in hook and loop discs.