This blade is a 1/2” 12mm wide cutter and fits both 3” Multi Cutters, MP21-3-M Master and MP21-3-B Basic models. With its 3” (75mm) diameter, ½” (12mm) width and 13/16” (20mm) carving depth, this cutter is another in the mid-size of the range. Like all of them, this is a powerfully wide cutter, solidly built, looks good and performs incredibly well! It is used individually but is complemented in performance by the equally fantastic 3” diameter Triangle Cutter MP21-6 and Square Cutter MP21-5-3. All three blades achieve different results to really expand your infinite creativity!