6 '' x No Hole Eclipse Film Hook & Loop smooth Grit sundry Pack Aluminum Oxide sanding discs are for demanding applications. of 800, 1200, 1500 & 2000 grits. : woodworking, self-propelled, metalworking, composites, Marine, region & upstanding surface work. : aluminum, untainted steel, fiberglass, composites, body filler, putty, paint, primer, pass coat, polyurethane, epoxy, softwoods, hardwoods, polyester upstanding surface & acrylic paint upstanding surface.