Specification Brand : HOHXEN BulletPoint1 : 3 Metric step drill bits can drill 28 different size of holes on different thickness of materials. One 3/16-inch to 1/2-inch six-step bit, 1/4-inch to 3/4-inch nine-step bit, and 1/8-inch to 1/2-inch 13-step bit(detailed hole size and drill depth of each drill bit. BulletPoint2 : Made with drop forged heat treated high speed steel (HSS) with titanium nitride coating for longer life time. BulletPoint3 : 4241 high-speed steel, used in hardness under 25 ¡ã workpiece, the plate thickness under 5 mm.such as carbon steel plate, sheet iron, insulation boards, wood. Cannot be used for stainless steel. BulletPoint4 : 1/4" hex shank (6.35mm)can be easily fit into power driver, drill and press drill. Two-flute design provides faster, smoother cutting without walking and a tri-flat shank ensure a firm grip.Classic high speed steel with titanium coating for proven capability and durability in drilling holes in plastic, aluminum, copper, stainless steel and many other types of sheet metal. BulletPoint5 : Comes with one 3/16-inch to 1/2-inch six-step bit, 1/4-inch to 3/4-inch nine-step bit, and 1/8-inch to 1/2-inch 13-step bit.The sets can cut through wood, sheet metal, steel and other surfaces. Color : Multi-colour CuttingAngleString : 135 degrees ExternallyAssignedProductIdentifier : 6345319844704 ExternallyAssignedProductIdentifier1 : 4009310428326 ExternallyAssignedProductIdentifier2 : 04009310428326 ExternallyAssignedProductIdentifier3 : 00088381400374 FinishType : Titanium GpsrSafetyAttestation : 1 IncludedComponents : 1x Makita D-40179 ItemName : HOHXEN 1/4" Quick-change Hex Shank SAE -3Pcs Step Drill Bit Set Titanium Nitride Coated M2 High Speed Steel Step Drill Bit Set 28 Sizes ItemPackageDimensions_Height : 40.2 centimeters ItemPackageDimensions_Length : 3.6 centimeters ItemPackageDimensions_Width : 3.7 centimeters ItemPackageQuantity : 1 ItemTypeKeyword : step-drill-bits Manufacturer : HOHXEN Material : Carbide ModelNumber : 49042832_1 NumberOfItems : 5 NumberOfPieces : 1 PackageLevel : unit PartNumber : WJ-0040 ProductDescription : Specification: Material: High-speed steel 4241 Surface Treatment: Titanium coated Shank Diameter: 6.35mm (hexagon shank) Six step bit:3/16", 1/4", 5/16", 3/8", 7/16", 1/2" Nine step bit: 1/4", 5/16", 3/8", 7/16", 1/2", 9/16", 5/8", 11/16", 3/4" Thirteen step bit: 1/8", 5/32", 3/16", 7/32", 1/4", 9/32", 5/16", 11/32", 3/8", 13/32", 7/32", 1/4", 9/32", 5/16", 11/32", 3/8", 13/32", 7/16", 15/32", 1/2"
Features: Titanium coated to reduce friction and heat. These drill bits works great in making a smooth, clean and perfectly round hole. Suitable for punch holes through sheet metal, steel plate, aluminum plate, brass or wood. This drill bit set includes 3 sizes(3/16-1/2,1/4-3/4,1/8-1/2), which meet your different needs perfectly. Made with drop forged heat treated high speed steel (HSS) with titanium nitride coating for longer life time. High speed, titanium nitride coated steel Replaces 28 separate drill bits Two fluted design for fast, smooth cutting. Automatically deburrs holes as you drill. 4241 high-speed steel, used in hardness under 25 ¡ã workpiece, the plate thickness under 5 mm. Such as carbon steel plate, sheet iron, insulation boards, wood. Cannot be used for stainless steel. When inject cold water while working, can effectively extend the service life of the drill bit.
User Instruction 1) Star drilling at low speed. Do not push too much. Let the drill bit to cut by itself. The harder the material it is working with, the lower speed shall be applied. 2) Inject coolant oil while working, it will dramatically increase the drilling efficiency and extend the drill bit life time. 3) Drill bits are good for wood, plastic, steel and sheet metal drilling. Stainless steel is not recommended.