Specification Brand : ZAWELIYO BulletPoint1 : [Quick and Accurate Drilling] With a step design, this drill bit allows for precise hole drilling from 6mm to 30mm diameter, ensuring efficiency. BulletPoint2 : [Enhanced Durability] Made of high-speed steel with nitride coating, reducing friction and extending the service life, ideal for various materials. BulletPoint3 : [Widely Application] Suitable for thin steel plates, wood, iron, aluminum alloy, pvc, and more, providing versatility in drilling tasks. BulletPoint4 : [Optimal Performance] High hardness steel ensures excellent durability, with an advisory speed range of 250rpm to 400rpm for effective results. BulletPoint5 : [Efficient Working] The split tip improves work efficiency and enables automatic deburring, making the drilling process more convenient. Color : Set two ExternallyAssignedProductIdentifier : 7448611902840 IncludedComponents : No ItemName : ZAWELIYO 6-30mm Metal Step Drilling Bit, Split Tip for Automatic Deburring, High Speed Steel Step Drill Bit for Iron, Wood, PVC, Aluminium Alloy ItemPackageDimensions_Height : 4 centimeters ItemPackageDimensions_Length : 14 centimeters ItemPackageDimensions_Width : 4 centimeters ItemTypeKeyword : step-drill-bits Manufacturer : ZAWELIYO Material : HSS ModelNumber : ZAWELIYOzcqmpwgf86 NumberOfItems : 1 PartNumber : ZAWELIYOzcqmpwgf86 ProductDescription : 1. SPECIAL STEP DESIGN: With step design, this drill bit allows for quick and accurate hole drilling within the diameter from 6mm to 30mm. 2. EFFICIENT DRILLING: Nitride coating will reduce friction and lower operating temperature, while water cooling will extend the service life. 3. NO NEED FOR HOLE: The split tip will not only improve the work efficiency, but also enables automatic deburring, very convenient. 4. FLEXIBLE APPLICATION: Widely used in drilling holes on thin steel plate, wood, thin iron, aluminium alloy, PVC and many other materials. 5. HIGH SPEED STEEL: High speed steel material with high harness is has excellent durability, and the advisory speed is 250rpm to 400rpm.