Double-sided abrasive laminated to a resilient foam core, these pads conform easily to curved surfaces.Convenient 2 x 2′ (5 x 5cm) size pads are printed with the grit number for easy identification and are reusable.When used dry, micro cloth outlasts common abrasives up to seven times, when used wet up to 10 times. WARNING: Drilling, sawing, sanding or machining wood products can expose you to wood dust, a substance known to the State of California to cause cancer. Avoid inhaling wood dust or use a dust mask or other safeguards for personal protection.