Features 10Pcs in 1 Set: Including 10pcs grinding head in different sizes, which adds more flexibility to your work. High Efficiency: Maximize the efficiency and effectiveness of cutting and material removal, very practical. Made of Carbide: The service life is 10 times that of high speed steel and 200 times that of grinding wheel. Flexible Using: Suitable for materials with relatively low density, such as wood, plastic, aluminium, etc. Easy to Carry: Comes with a plastic protective box , making the storage safer and the carrying simpler. Specification: Item Type: Rotary File Material: tungsten carbide cemented carbide Shank Length: Approx. 38mm / 1.5in Shank Diameter: Approx. 3mm / 0.1in Scope of Application: For burring, levelling weld, edging.  Package List: 10 x Rotary File 1 x Storage Box Package List 10 x Rotary File 1 x Storage Box