Specification Brand : Fafeicy BulletPoint1 : [Large Spiral Angle Design] 38° Large spiral angle design increases cutting chip flute, reducing clogging and improving cutting efficiency. BulletPoint2 : [Convenient and Secure] Standard 1/2 inch round shank for convenient and secure use, suitable for a variety of cutting tasks in wood, metal, and more. BulletPoint3 : [Quenching Process] The drilling head is processed by quenching to ensure excellent performance, allowing for smooth and efficient drilling. BulletPoint4 : [Premium 9341 Steel] Forged from premium 9341 steel with high hardness and good wear , ensuring durability for long-term use. BulletPoint5 : [Double Relief Angle Design] 135° Drill point adopts a double relief angle design to achieve incisive cutting, enhancing precision and accuracy. ItemName : Twist Drill Bit Milling Cutter with High Hardness and Double Relief Angle Design for Wood and Metal 1 / 2in Dia Reduced Shank HSS (21mm) ItemPackageDimensions_Height : 2 centimeters ItemPackageDimensions_Length : 16 centimeters ItemPackageDimensions_Width : 2 centimeters ItemTypeKeyword : short-length-drill-bits Manufacturer : Fafeicy ModelNumber : Fafeicy0d5v17epag-04 NumberOfItems : 1 PartNumber : Fafeicy0d5v17epag-04 ProductDescription : Specifications: Condition: Brand New Material: 9341 steel Color: Shown as picture Shank Diameter: 1/2in Package Weight: Approx.138g(16mm), 156g(17mm), 189g(20mm), 215g(21mm) Package List: 1 * Twist Drill Bit Note: Please note that the new type and old type of this product will be sent randomly, and make sure you will not mind before ordering.