These Saburr Tooth Carbide Shaping Cups feature razor sharp carbide cutting teeth arranged in an open pattern that resists loading. They are great for rapid shaping, carving and sculpting (e.g., spoons and bowls). All the cups have a 2" head diameter and 1" head thickness. They come mounted on a mandrel with a 1/4" shank. Use with your favorite flex-shaft or die grinder. Available in 3 grits. Maximum RPM 25,000. Made in USA.