It is durable and does not allow secondary burrs to be performed efficiently, so it can be used for both mechanical and manual operation; Cutting material: Steel, alloy steel, stainless steel, copper alloy, aluminum alloy; Tip diameter: 0.1 inches (2.5 mm); Effective blade diameter: 0.4 inches (10.4 mm); Total length: 2.0 inches (50 mm); Shank diameter: 0 mm). Cutter tip angle: 0 mm). 0° Non-coated High Speed Steel (HSS)