When you first buy any 2” Blade Cutter, it automatically comes with a ¼” (6mm) wide, Circular (Round) blade. This offers more selections for the range of 2” circular (Round) cutters which has 3 different width cutters, 6mm, 8mm and 12mm. So depending on what width you want, each cutter is slightly different but will more than do the job. This blade is the 15/32” (12mm) wide cutter and only fits both 2” Belt Cutters, MP21-2-M Master and MP21-2-B Basic models. With its 2” (50mm) diameter, 15/32” (12mm) width and 3/8” (10mm) carving depth, this powerful cutter is the widest of the 2” cutters, is solidly built, looks good and performs incredibly well! It is used individually but is complemented in performance by the equally fantastic 2” diameter Triangle Cutter MP21-2-T and Square Cutter MP21-2-S. All three blades achieve different results to really expand your infinite creativity!