5Pcs Hss Step Drill Bit & Automatic Center Punch,High Speed Steel Drill Bit Set(Black)

High Speed Step Bit Metal, steel step drill Hex Shank, Step Drill Bits Titanium Coated (6PCS,Black) Feature： [Increased Cutting Speed]118 degrees split point tip provides faster cutting and prevent sliding while increasing the wear resistance. [Titanium Coating]Titanium coating ensures outstanding durability and sharpness which can reduce the friction and run cooler. [Double-edged Design]The hexagonal shank titanium drill uses a double-edged design to make cutting smoother and smoother. [Accurate Drilling]Laser engraved sizes provides accurate positioning assistance for precise drilling. ▲Note: Check the concentricity of the spindle and spring chuck and the clamping force of spring chuck, for the concentricity may cause the drill bit broken and make drill hole too large. Step Sizes: Bit #1: 1/4", 3/8", 1/2", 5/8", 3/4", 7/8", 1", 1-1/8", 1-1/4", 1-3/8” Bit #2: 3/16", 1/4", 5/16", 3/8", 7/16", 1/2", 9/16", 5/8", 11/16", 3/4", 13/16", 7/8" Bit #3: 1/4", 5/16", 3/8", 7/16", 1/2", 9/16", 5/8", 11/16", 3/4" Bit #4: 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" Bit #5: 3/16", 1/4", 5/16", 3/8", 7/16", 1/2" Package includes: 5 x Hss step drill bit 1 x Automatic center punch 1 x Aluminum packaging box

• TITANIUM HIGH-SPEED STEEL:ability of oxidation resistance, no rust and wear, long service life with titanium and cobalt plating coating.Aluminum, copper, stainless steel and many other types of the metal sheet.
• V-TYPE OPENING DESIGN:Double cutting blades and V-type openings design ensure a faster and smoother cutting; 3-sided shank design prevents slip in drill chuck can cut through the wood, sheet metal, steel, and other surfaces.
• SET INCLUDES:Bit #1: 1/4", 3/8", 1/2", 5/8", 3/4", 7/8", 1", 1-1/8", 1-1/4", 1-3/8; Bit #2: 3/16", 1/4", 5/16", 3/8", 7/16", 1/2", 9/16", 5/8", 11/16", 3/4", 13/16", 7/8"; Bit #3: 1/4", 5/16", 3/8", 7/16", 1/2", 9/16", 5/8", 11/16", 3/4"; Bit #4: 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"; Bit #5: 3/16", 1/4", 5/16", 3/8", 7/16", 1/2".
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