Item Type: Tungsten Steel Grinding Head_x000D_Material: Tungsten steel_x000D_Model: 3x4x30x54_x000D_Type: Double pattern_x000D_Shank Diameter: Approx. 3mm / 0.1in_x000D_Tool Diameter: Approx. 4mm / 0.2in_x000D_Blade Length: Approx. 30mm / 1.2in_x000D_Total Length: Approx. 54mm / 2.1in_x000D_Scope of Application: Suitable for various soft and hard materials such as metal, wood, copper, aluminum, etc. 1Selection of hard tungsten steel, for longer life, possess high hardness, wear resistance, good strength and toughness 2This product come with good processing quality, good finish and high accuracy 3The speed is generally 6000-50000 rpm, improve work efficiency, save time and effort 4Universal round shank design, suitable for a wide range of machines, and easier to clamp and correct the tool 5Double groove-suitable for softer materials, wood/aluminum/plastic and other materials surface and inner cutting and repairing1 x Tungsten Steel Grinding Head