1) Designed to polish and (http://maplered.com) finish any surface that electric tools cannot. They are ideal to retouch scratched tops, polish edges and (http://maplered.com) under-mounted sinks. 2) Used for grinding Marble (http://www.lightemprador.com) and (http://maplered.com) Granite (http://tanbrown.org) . 3) #60, #120, #220, #400 metal bonds available for dry use. 4) #800, #1800, #3500 resin bond available for wet use. Welcome to contact us to get more details.