Foredom Dressing Stone, Style A-10333. Silicon carbide block for dressing and cleaning mounted abrasive points. 60 grit, 3 1/8" wide x 1 1/4" deep x 1/2" high. Reshapes points back to perfect concentricity by running the mounted point in the groove comparable in size. Also cleans the point and exposes fresh abrasive particles. Made in USA.