Specification Brand : Greensen BulletPoint1 : Easy to Carry and Easy to Use: With the step drill we provide, you can process holes of various diameters, which greatly saves you trouble. This 5-piece kit can replace 50 individual drill sets. Comes with an aluminum carrying case, you can put it in the case and take it with you BulletPoint2 : Step Drill: The 5-piece step drill consists of fully ground, high-speed industrial-grade steel that reduces friction and heat generation. After heat treatment and polishing, it ensures high wear proof and durability. Suitable for high quality tools of various sizes. BulletPoint3 : High Hardness and Good Wear proof: The step drill bit consists of high-speed steel with high hardness and good wear proof, which is strong and stable. In accordance with the need to machine holes of different diameters, one-time machining of large holes can be achieved without having to replace the drill and the positioning hole. BulletPoint4 : Wide Range of Applications: The step drill set is very well suited for cutting holes in various materials, suitable for metal, wood, plastic, aluminum, copper etc. Not suitable for steel and hard metals. Suitable for home improvement, general construction and engineering purposes. BulletPoint5 : Three-sided Shaft Design: Double- design, the step drill kit is faster, smoother and cleaner cutting. The three-sided shaft design can prevent the drill chuck from slipping and can penetrate wood, sheet metal, steel and other surfaces. The spiral design removes chips and allows particles to escape easily. Color : Gold CuttingAngleString : 1/4 inches ExternallyAssignedProductIdentifier : 6467420295159 ExternallyAssignedProductIdentifier1 : 0766565132241 ExternallyAssignedProductIdentifier2 : 00766565132241 ExternallyAssignedProductIdentifier3 : 766565132241 FinishType : Titanium IncludedComponents : Norseman Titanium Nitride Quick Release Ultra Bit Super Premium Multi-Diameter 3-pc Step Drill, 1-Pack ItemName : 5pcs Hss Cobalt Multiple Hole 50 Sizes Step Drill Bit Set, with Storage Box Professional Spiral Grooved Step Drill Bit Set, with Aluminum Case for 50 Different Size Holes, High Speed Steel ItemPackageDimensions_Height : 4 centimeters ItemPackageDimensions_Length : 16 centimeters ItemPackageDimensions_Width : 12 centimeters ItemPackageQuantity : 1 ItemTypeKeyword : step-drill-bits Manufacturer : Greensen Material : Stainless Steel Material1 : Material Material2 : Material Material3 : Material Material4 : Material Material5 : Material Material6 : Material Material7 : Material Material8 : Material ModelNumber : a19042700ux0268 NumberOfFlutes : 2 NumberOfItems : 1 PartNumber : Greensenyu57ox03sr ProductDescription : Features: 1. This set replaces 50 individual drill sets. 2. Made by Long life high speed steel. 3. Self starting no need for a hole. 4. Cobalt coated to reduce friction and run cooler. 5. Automatically deburrs holes as you drill. 6. Includes protective padded aluminum case.