Material: Carbide and Steel Shank diameter: 8mm or 0.31" Blade diameter: 12.7 mm or 0.5" Blade length: 25 mm or 1" Total length: 82mm or 3.23" Contents: 1 x 8mm shank flush router bit. 8mm router bit: shank diameter: 8mm or 0.31" blade diameter: 12.7mm or 0.5" blade length: 25mm or 1" total length: 82mm or 3.23" Double Bearing Router Bit: This bit can be used on upper or lower models. Particularly suitable for jig work when milling round or curved wood with sensitive end grains High quality material: high hardness, good wear resistance, significantly improve service life. High frequency welding: Cutters (C3 micrograin tungsten carbide) for smooth cutting into billets, resulting in clean, chip-free cleaning Application: This tool can process synthetic wood workers with smooth surfaces such as hardwood, softwood, wood, etc., but avoid processing metal materials such as copper and iron and non-woody materials such as sand and stone.