<p>High Quality Carbide Tool Set: This set contains 8 of the most popular shapes and comes with a suitable box. With 1/4 inch shank, it is suitable for processing various metals and most rotary grinders. It is an excellent choice for metal kidnapping precision when shaping, flattening or transplanting cast iron, steel and other ferrous metals. </p><p>Advanced Tungsten Material: The original pure tungsten carbide burr has an ultra-long service life, 10 times more durable than other HSS tools, and 200 times more durable than small wheels. The hardness can reach HRC70, sharp and strong. </p><p>Double Precision Cutting: Double cutting style, the left and right spiral grooves combine to produce chisel-type cutting teeth, this precision when combined with precision grinders, can achieve smooth operation, fast metal removal and obtain fine surface treatment. </p><p>Wide Application: Widely used in metal processing, tool making, model engineering, wood carving, jewelry making, welding, chamfering, molding, deburring, grinding, transplanting cylinder heads and engraving. Including body repair shops, fabrication shops, brake shops, industrial shops, mold makers. </p><p>Dimension Information</p><p>Handle Diameter: 6mm (1/4 inch)</p><p>Suitable for most rotary tools with 1/4 chuck, the large size head can better complete engraving and grinding work.</p><p>Material</p><p>Made of heat-treated tungsten carbide material, sharp and wear-resistant, can bring efficient grinding and engraving experience.</p><p>Various Shapes</p><p>The kit includes 8 heads of different shapes, 1 of each shape with double cuts to meet your different requirements.</p><p>On Wood</p><p>Double-cut files, suitable for wood, aluminum and other soft metal materials.</p><p>Mainly used with electric or pneumatic tools.</p><p>On Pure Copper</p><p>Can be used for metal or non-metal engraving, mold cavity processing, impeller channel grinding, etc.</p><p>About Aluminum</p><p>The recommended speed is between 6000-50000rpm. The cutting file should be placed in the correct position and it is recommended to wear goggles when operating.</p>