Diamond hand polishing pads are used to perform light on-site polishing/recovering of scratches and other hand polishing jobs. They are ideal for polishing granite, marble and concrete. The entire set comes with50 grit, 100 grit, 200 grit and 400 grit pads are electro-plated and 500, 800, 1500 and 3000 grit are resin bonded polishing pads. 500 grit resin bonded pad is used to allow smooth transition from 400 grit electro-plated pad to make it easier to achieve high gloss more efficiently. Arc shaped foam block makes the pads light weight and comfortable for grabbing.