It is durable and prevents secondary burrs from appearing out, so you can work efficiently. Effective blade diameter: 0.5 inches (12.4 mm). Tip diameter: 0.1 inches (2.8 mm). Total length: 2.2 inches (56 mm). Shank diameter: 0.3 inches (8 mm). Cutter tip angle: 3.5 inches (90 cm). Surface treatment: titanium coating. Country of origin: Germany. Weight: 0.8 oz (23 g).