Specification Brand : KUIDAMOS BulletPoint1 : 【High-Speed Steel】Made of ti-coated high-speed steel, these hex shank step drill sets have high hardness. BulletPoint2 : 【 Step Drill Bit Sets】The step drill bit sets adopts groove design, help the electric drill clamp it more firmly, prevent sliding or falling off during rotation. BulletPoint3 : 【Use】It is very suitable for using to cut holes in a variety of materials including steel, brass, wood, plastic, etc. BulletPoint4 : Cobalt coated for smoother cooler cutting, automatically deburrs holes as you drill. BulletPoint5 : 【Strong And Durable】Using high‑quality materials, strong and durable, has a long service life. CustomerPackageType : Standard Packaging CuttingAngleString : 135 degrees ExternallyAssignedProductIdentifier : 9588126180536 FinishType : Titanium ItemName : 5pcs Hss Cobalt,Step Drill Bit Set 5PCS HSS Cobalt Step Drill Bit Set Tools Step Drill Bit Tool Set with Aluminum Case ItemPackageDimensions_Height : 18.8 centimeters ItemPackageDimensions_Length : 4.9 centimeters ItemPackageDimensions_Width : 13.6 centimeters ItemPackageQuantity : 1 ItemTypeKeyword : step-drill-bits Manufacturer : KUIDAMOS Material1 : High Speed Steel Material2 : Cobalt PartNumber : KUIDAMOSa7hm0evd3y ProductDescription : Specification: Features: - This Item ia brand new - This set replaces 50 individual drill bits. Two-flute layout gives you faster, smoother cutting. 3-sided (-FLAT) shank will not slip in your drill\'s chuck. Cobalt coated for smoother cooler cutting - Ti coated to reduce friction and run cooler - Large bit has 3-sided shank and small bits have hex shank to prevent slip in drill chuck - Automatically deburrs holes as you drill - Life high speed steel - Includes protective padded aluminum case - Package Size:15cm*10.5cm*4.2cm(L*W*H) Sizes: #1: 3/16\" to 1/2\" 6 Steps (3/16\'\', 1/4\'\', 5/16\", 3/8\'\', 7/16\'\', 1/2\'\') #2: 1/8\" to 1/2\" 13 Steps (1/8\", 5/32\", 3/16\'\', 7/32\", 1/4\'\', 9/32\", 5/16\", 11/32\", 3/8\'\', 13/32\", 7/16\'\', 15/32\" , 1/2\'\') #3: 1/4\" to 3/4\'\' 9 Steps (1/4\'\', 5/16\", 3/8\", 7/16\", 1/2\", 9/16\", 5/8\", 11/16\", 3/4\") #4: 1/4\" to 1-3/8\"\' 10 Steps (1/4\'\', 3/8\", 1/2\", 5/8\", 3/4\", 7/8\", 1\", 1-1/8\", 1-1/4\", 1-3/8\") #5: 3/16\" to 7/8\" 12 Steps (1/4\'\', 5/16\", 3/8\", 7/16\", 1/2\", 9/16\", 5/8\", 11/16\", 3/4\", 13/16\", 7/8\") Package included: 1 x 1/4-1-3/8 Step Drill 1 x 3/16-7/8 Step Drill 1 x 1/4-3/4 Step Drill 1 x 1/8-1/2 Step Drill 1 x 3/16-1/2 Step Drill 1 x Aluminum Box