Specification Brand : KATUR BulletPoint1 : [Step Drill Bit] Gold step drill bit includes international sizes: 10,15,20,25,30,35,40,45mm, replacing 8 individual drill bits. BulletPoint2 : [Durability and sharpness] High speed steel with titanium coating improves durability and sharpness performence, reducing the friction and cooling the bit. BulletPoint3 : [Stable and soomth] Triangle round shank to prevent slip during the rotation.Two-flute design provides faster, smoother cutting, provided with small pressure. BulletPoint4 : [Suit for] The step drill bit is suitable for punch holes through sheet metal, steel plate, aluminum plate, brass or wood. BulletPoint5 : [Buy with Confidence] We offer "TWO YEAR" warranty on item(s) that confirm to be manufacturer defect.We'll respond within 24 hours on weekdays.(Please clamp the shaft in right place and necessary protective measures in woodworking processing.) FinishType : Titanium GpsrSafetyAttestation : 1 ItemName : KATUR Step Drill Bit Titanium HSS Step Cone Drill Bit Hole Cutter Set 12mm Triangle Round Shank Fluted Edge Step Drill 8 Sizes 10-45mm (Straight Groove, Gold) ItemPackageDimensions_Height : 5 centimeters ItemPackageDimensions_Length : 10 centimeters ItemPackageDimensions_Width : 5 centimeters ItemPackageQuantity : 1 ItemTypeKeyword : step-drill-bits Manufacturer : KATUR Material : High Speed Steel PartNumber : BT-5368-gold ProductDescription : Features: Made of high speed steel,hardness and stable. High-speed steel step drill, nice quality and durable. Two straight flute design gives you faster, smoother cutting. Suitable for punch holes through sheet metal, steel plate, aluminum plate, brass or wood.