Shape is regular with wider strength scope. mid-toughness,medium thermal ... :Shape is complete with high purity,mid-toughness,medium thermal stability and high impact resistance.Suitable for cutting mid-hard granite and marble,cutting ... /400Grade: MBD4, MBD6, MBD8, MBD10, MBD12Usage:Suitable for cutting mid-hard granite and marble,cutting/drilling non-reinforced concrete and diamond dressing products ...