BTS-420. Straight & Profile Dresser - Grain Plate Dressing Tool

Straight and profile dressing small wheels:
Handset Natural Diamond Grains.
Centre Mounted 10 mm wide X 12mm depth
W Tungsten hot-pressed bond.
Blade set at 0 degree.
7/16'' diameter x 1'' long with four flats shank.
Suggestion for Wheel grit size:
Part Code. Wheel grit size
BTS-420. 30-40
BTS-419. 50-60
BTS-290. 80-100