Specifications: TiSiN coating allows for direct rough to fine machining of heat-treated materials up to 55 HRC, reducing tool changes, improving machine efficiency, and saving manufacturing time. Made from 0.6m ultra-fine grain tungsten steel substrate for enhanced wear resistance and strength, designed for high-speed and high-strength cutting applications. Fully ground construction ensures long-lasting sharpness and durability, maintaining optimal cutting performance throughout the tool's service life. Universal chamfered round shank design offers high compatibility, improved vibration resistance, and increased cutting speed. Item Name: Milling Cutter Material: Tungsten Steel Features: Smooth cutting, high efficiency, wide application, durable hardware tool Size Chart: 1mm x 50 x 4D: Blade Length: 3mm (0.12"), Shank Diameter: 4mm (0.16"), Blade Diameter: 1mm (0.04"), Total Length: 50mm (1.97") 1.5mm x 50 x 4D: Blade Length: 4mm (0.16"), Shank Diameter: 4mm (0.16"), Blade Diameter: 1.5mm (0.06"), Total Length: 50mm (1.97") 2mm x 50 x 4D: Blade Length: 6mm (0.24"), Shank Diameter: 4mm (0.16"), Blade Diameter: 2mm (0.08"), Total Length: 50mm (1.97") 2.5mm x 50 x 4D: Blade Length: 7mm (0.28"), Shank Diameter: 4mm (0.16"), Blade Diameter: 2.5mm (0.10"), Total Length: 50mm (1.97") 3mm x 50 x 4D: Blade Length: 8mm (0.31"), Shank Diameter: 4mm (0.16"), Blade Diameter: 3mm (0.12"), Total Length: 50mm (1.97") 3.5mm x 50 x 4D: Blade Length: 8mm (0.31"), Shank Diameter: 4mm (0.16"), Blade Diameter: 3.5mm (0.14"), Total Length: 50mm (1.97") 4mm x 50 x 4D: Blade Length: 10mm (0.39"), Shank Diameter: 4mm (0.16"), Blade Diameter: 4mm (0.16"), Total Length: 50mm (1.97") Notes: Due to lighting and screen setting differences, the item color may vary slightly from images. Please allow slight variations in dimensions due to manual measurement. Package Includes: 1 x Milling Cutter