Specification AgeRangeDescription : adult Brand : Xolsurg BulletPoint1 : 4241 high speed steel construction for high strength and long durability. BulletPoint2 : Nitriding treatment to make the drill bit harder. BulletPoint3 : It can drill and expand hole on iron sheet and aluminum sheet up to 2mm thick. BulletPoint4 : Work with electric drill, bench drill, etc. BulletPoint5 : Excellent quality, long service life, saving cost for you. BulletPoint6 : It is very suitable for cutting holes in various materials, including carbon steel, brass, wood, plastic, etc. Color : Black Oxide ExternallyAssignedProductIdentifier : 4547788500743 IncludedComponents : No IncludedComponents1 : 1 x Countersink Drill IncludedComponents2 : 4 x Drill Bits ItemName : Xolsurg 6‑30mm Cone Step Drill Bit Nitriding High Speed Steel Hole Cuttet for Metal Sheet ItemPackageDimensions_Height : 4 centimeters ItemPackageDimensions_Length : 11 centimeters ItemPackageDimensions_Width : 4 centimeters ItemPackageQuantity : 1 ItemTypeKeyword : step-drill-bits Manufacturer : Xolsurg ModelName : PHTGTWMEDC ModelNumber : Xolsurgm1e4uvbsa6 NumberOfBoxes : 1 NumberOfItems : 1 NumberOfPieces : 1 PartNumber : Xolsurgm1e4uvbsa6 ProductDescription : Item Type: Step Drill Bit Material: High Speed Steel Treatment: Nitriding Black Total Length: Approx 100mm / 3.9in