The Single Point Diamond Dresser is more versatile which is used for truing and dressing purpose of grinding wheel. The diamond for the single point dressing tools are selected for their structural strength, degree of sharpness, & lack of determental flaws. The proper selection of single point diamond dresser depends on the dimension of grind hardness. grit size and abressive type. JPT offers 'A', 'AA' 'AAA' class which will fulfill basic requirement.