Top-quality 3M pads with a precision dot pattern of 100% diamond. Perfect for fast, uniform grinding and smoothing of rough surfaces, sharp edges and flashing. The lightweight foam base fits the palm of the hand. Micron-graded diamonds are anchored to the backing with a superior metal-plated bond, more durable that resin bonding. We recommend using them wet. Use the set sequentially from coarsest to finest for best results. Numbers refer to diamond mesh size.