... 2.Various grain sizes from rough to fine 3.Various diameter from 75mm-910mm 4.High quality ... 6A2, 11A2, 12A2, 11V9, 9A3 and so on 3. Diamond or CBN grain size can be from rough ... from south korea 2) Excellent after-sales service 3) The products own longer service life, reaching to ... tooling production, such as: 1) Tungsten carbide, steel, mold 2) Glass and optical glass 3) Stone, concrete, asphalt and ...