Diamond metal bond grinding disc Description:Metal Bond Discs are specially designed for polishing and grinding concrete,granite,marble,limestone,travertine and terrazzo,Metal Bond Diamond Polishing Wheels for rough-polishing Wet use only.The special features are as follows:Diamond segment is hot pressd and professionally welded on the plate to make sure the density of segment is reasonable and help to extend the lifetime of the disc.The height of diamond segment is higher than other general metal bond discs in the market.Higher segments would make the disc not easy to wear out ;Grit:50#,100#,200#,400# ;Application:Used by hand-operated machine for granite slabs in rough calibrating and smoothing .