? Heavy Duty Dressers ? For use on coarse, large, high speed grinding wheels ? New design permits quick cutter change by operator ? Full length foot rest guides dresser evenly over rough edged tool rests ? Cutter unit is fully shielded ? Cutters mounted at an angle to provide a shearing and picking action on the Order No. LG50?58 dresser ? Both cutter units revolve on sealed, dust protected ball bearings enabling them to keep up with high speed wheels.