Material: Tungsten Carbide. Cutting Diameter: 10mm. Total Length: 50-60mm (When purchasing, please get the coupon code on the product page to get a better price.) All cutters with a shank size of 6.35 mm (approx. 1/4 inch) are compatible with most die grinders or rotary tools Double-Cut style features rows of cutting teeth in two directions that intersect for rapid material removal and a rougher finish Suitable for metalworking, tool making, model making, wood carving, jewelry making, fabrication, welding, beveling, shaping, deburring, grinding, etc. High performance for processing copper, aluminum, alloys, iron, marble, jade, wood and plaster, etc.| NOTE: Does not apply to bench exercises Functions Made of heat-treated carbide that is durable, sharp and durable The full cost of treatment can be reduced by about tenfold. The service life is long, 10 times more durable than a high-speed steel cutting tool, 200 times more durable than a small wheel. For the most difficult work, it can be replaced with a small grinding wheel and will not pollute the dust. Good machining quality, high degree of processing, can determine the high precision of the mold cavity of various molds. Convenient to use, safe and reliable, reduce labor intensity, improve working environment. Specification: Material: Tungsten Carbide Cutting edge diameter: 10 mm Stem diameter: 6.35 mm (1/4 ") Total length: 50-60mm Content: 5 x tungsten carbide cutters NOTE: Always make sure the drill shank is fully inserted into your collet and tightened securely