Specification Brand : Airshi BulletPoint1 : Extensive Uses: Allows for wide application on various materials, such as steel plates, cast iron, stainless steel, aluminum copper and more. BulletPoint2 : 3 Flute Blades: Mainly made of YW2 cemented carbide steel, the 3 flute annular cutter has high hardness, which will largely simplify the work. BulletPoint3 : Including 7Pcs: There are a connecting rod and 6pcs different mag drill bit of 13mm, 15mm, 17mm, 19mm, 21mm, 25mm, more than enough for needs. BulletPoint4 : Easy to Install: Comes with a compact size and a light weight, all the annular cutters are very convenient to install within several minutes. BulletPoint5 : Cutting: Moreover, the spiral flute enables little cutting resistance and easy chip removal, ensuring no stuck during the processing. ExternallyAssignedProductIdentifier : 7805368413850 ItemName : Airshi 7Pcs Mag Core Drill Bit Set, 13mm-25mm Universal Shank, 3 Flute Carbide Steel, Easy Installation for Metal ItemPackageDimensions_Height : 6 centimeters ItemPackageDimensions_Length : 26 centimeters ItemPackageDimensions_Width : 21 centimeters ItemTypeKeyword : annular-cutters Manufacturer : Airshi ModelNumber : Airshi8ngpo9ig4y NumberOfFlutes : 3 NumberOfItems : 1 PartNumber : Airshi8ngpo9ig4y ProductDescription : 1. 3 Flute Blades: Mainly made of YW2 cemented carbide steel, the 3 flute annular cutter has high hardness, which will largely simplify the work. 2. Cutting: Moreover, the spiral flute enables little cutting resistance and easy chip removal, ensuring no stuck during the processing. 3. Extensive Uses: Allows for wide application on various materials, such as steel plates, cast iron, stainless steel, aluminum copper and more. 4. Including 7Pcs: There are a connecting rod and 6pcs different mag drill bit of 13mm, 15mm, 17mm, 19mm, 21mm, 25mm, more than enough for needs. 5. Easy to Install: Comes with a compact size and a light weight, all the annular cutters are very convenient to install within several minutes.