Feature: 1. Selection of hard tungsten steel, for longer life, possess high hardness, wear resistance, good strength and toughness 2. This product come with good processing quality, good finish and high accuracy 3. The speed is generally 6000-50000 rpm, improve work efficiency, save time and effort 4. Universal round shank design, suitable for a wide range of machines, and easier to clamp and correct the tool 5. Double groove-suitable for softer materials, wood/aluminum/plastic and other materials surface and inner cutting and repairing Specification: Item Type: Tungsten Steel Grinding Head Material: Tungsten steel Model: 3x4x30x54 Type: Double pattern Shank Diameter: Approx. 3mm / 0.1in Tool Diameter: Approx. 4mm / 0.2in Blade Length: Approx. 30mm / 1.2in Total Length: Approx. 54mm / 2.1in Scope of Application: Suitable for various soft and hard materials such as metal, wood, copper, aluminum, etc. Package List: 1 x Tungsten Steel Grinding HeadThis product come with good processing quality, good finish and high accuracy. Selection of hard tungsten steel, for longer life, possess high hardness, wear resistance, good strength and toughness. The speed is generally 6000-50000 rpm, improve work efficiency, save time and effort. Universal round shank design, suitable for a wide range of machines, and easier to clamp and correct the tool. Double groove-suitable for softer materials, wood/aluminum/plastic and other materials surface and inner cutting and repairing. Double groove-suitable for softer materials, wood/aluminum/plastic and other materials surface and inner cutting and repairing.