Used for wood metal plastic fiberglass paint primer solid surface materials composites hand sanding and half and quarter sheet sanders Open coat grain with a non-loading stearate minimizes loading with a cool cut for longer lasting abrasives Strong C-weight paper backing with latex impregnated paper for strong and flexible backing abrasives will not come off when folded over P graded silicon carbide grain breaks down to create sharp points to cut well through hard surfaces and produce a consistent finish Full resin on resin bond to keep the grain on the cutting surface and waterproofing the sheet