Top 10 Cobalt Step Drill Bit – Step Drill Bits

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1. CO-Z


CO-Z 5pcs Hss Cobalt Multiple Hole 50 Sizes Step Drill Bit Set with Aluminum Case

CO-Z #ad - Different sized shanks ensure compatibility with 1/4, 3/8 and 1/2 in. Please mark the spot that you are to drill for easier drilling and improved drill bits life. Cobalt high speed steel along with the titanium coating ensures extreme durability, will stay new and shiny for years to come. All the bits come in a well-organized case for easy transport and storage. The board must be smaller in thickness than the height of step drill bits. Non-walking drill tip provides fast and smooth drills on steel sheets, aluminum sheets, wood board, plastic board etc. Chuck sizes.
BrandCO-Z #ad
ManufacturerCO-Z #ad
Height6.1 Inches
Length4.33 Inches
Width1.57 Inches
Part NumberCO-Z SDB-0000
ModelCO-Z SDB-0000



High-Speed Metal Steel Step Drill Bit Set with Aluminum Case, Hss Cobalt Multiple Hole 50 Sizes, HYCLAT 5pcs Titanium Step Drill Bit

HYCLAT #ad - The step drill bits can work with stainless steel sheets, aluminum alloy, and wood. Titanium high-speed steel: classic and sturdy high-speed steel with titanium coating for proven capability and durability in drilling holes in plastic, copper, aluminum, stainless steel and many other types of the metal sheet.

What you get - hyclat step drill, 24 months warranty - Ideal Gift for Father's Day, aluminum case or canvas Bag, Perfect for DIY lover. Features: 5pcs step drill bits enable 50 sizes - each step drill bit can drill several bore diameters. Double cutting blades & three-sided shank - double cutting blades and X-type openings design ensure a faster and smoother cutting; 3-sided shank design prevents slip in drill chuck can cut through the wood, steel, sheet metal, and other surfaces.

The protective aluminum case makes the drills not easy to dull. It's can work as 50pcs twist drill bits. You don't have to replace drill bit constantly for different bore sizes. Widely application: the step drill bits can be used to chamfer, bur, plastic material, and drill or enlarge holes.
BrandHYCLAT #ad
ManufacturerHYCLAT #ad
Weight0.9 Pounds
Part NumberHSS0501

3. CO-Z


Steel, Spiral Step Drill Bit, Metal Sheet, CO-Z Cobalt Added M35 Step Drill Bit, Unibit Drill Bit for Cutting Drilling Holes On Stainless Steel, Multiple Hole Stepped Up Bit for Professionals

CO-Z #ad - One bit for all - every bit comes with 10 sizes so you can drill up to 10 holes with different diameters, saving you time and efforts to change bits, every package comes with 5 bits, that makes it 50 diameters in total.

Jam-free performance - dual-flute design and three-sided shank design is optimized for cordless drills in high speed provides greater speed and control while minimizing steel scurf flying around, to lengthen service life, please do not set drilling speed at its maximum to avoid damage to the cutting edge. Universal compatibility - designed for drilling on steel sheets up to 008 in. Pvc and wooden boards up to 02 in. Marked with obvious marks for easy and precise hole drilling, compatible with drills 1/4”, 3/8”, acrylic, 1/2”.

Durable & sturdy w/cobalt added - solid m35 molybdenum high speed construction with cobalt added for extra durability, close to impossible to snap compared conventional drill bits, the unique 3-sided shank prevents slip in drill chuck and reduces shocks; oiling the bits recommended before every use to maximize the service life.
BrandCO-Z #ad
ManufacturerCO-Z #ad
Part NumberSDBCM35CO

4. Irwin Tools


Irwin Industrial Tools 10231CB Unibit 1/32-Inch 13-Steps Cobalt Step Drill Bit

Irwin Tools #ad - Drill bit is engineered with M-35-grade cobalt steel for maximum life when drilling in tough steel. Drills 13 hole sizes from 1/8 inch to 1/2 inch in 1/32-inch increments. Drill bits feature a radial concave flute. Drills 13 hole sizes from 1/8 inch to 1/2 inch in 1/32-inch increments. Irwin drill bits have laser-marked sizes for simple identification. Drill bit is engineered with M-35-grade cobalt steel for maximum life when drilling in tough steel. Irwin drill bits have laser-marked sizes for simple identification. Drill bits feature a radial concave flute.
BrandIrwin Tools #ad
ManufacturerIRWIN #ad
Height1.5 Inches
Length6 Inches
Weight0.81 Pounds
Width3 Inches
Part Number10231cb



1/4 to 1-3 / 8-Inch Drill Bit, M35 Cobalt Spiral Groove & HSS Titanium Coated Straight Groove Step Drill Bit Set, Large Hole Drill Suitable for DIY Lovers, Used for Drilling Plate Aluminum Metal Wood Hole, Double-edged Blade, THINKWORK Step Drill Bit

THINKWORK #ad - It is an essential item for handymen or professionals, there is a size mark on the side of each step, 1/2", 7/8", 1- 1/4", 1-1/8", very suitable for home maintenance and light work. The addition of cobalt increases heat resistance and is widely used in metal manufacturing. The double spiral groove & double straight groove design can reduce cutting resistance, remove chips faster, and make particles easier to escape, make cutting smoother, thereby achieving cleaner drilling operations.

Total 20 step sizes1/4", 5/8", 1", 3/8", 1-3/8", 3/4", which is convenient for you to use. The thinkwork after-sales service team will contact you in time to solve your problem. Hss titanium coatinganother step reaming drill is made of high-speed steel, and extends the service life. The red hardness, wear resistance and toughness is stronger, such as expanding the kitchen sink hole, please use it.

Keep the drill bit clean. Efficient designthe 135°x split point can be automatically centered to increase the cutting speed and prevent walking. M35 cobalt high speed ​​steelthe durable step drill is made of hss m35 cobalt, not easy to become dull or broken. It is an ideal choice for cutting carbon steel and stainless steel. After-sales serviceif you encounter any problems when using our products or are not satisfied with the products, please feel free to contact us. The convenient 3/8” 9.
ManufacturerTHINKWORK #ad

6. Irwin Tools


3-Piece 10502CB, IRWIN Step Drill Bit Set

Irwin Tools #ad - Irwin drill bits have laser-marked sizes for simple identification. Drill bit is engineered with M-35-grade cobalt steel for maximum life when drilling in tough steel. Drill bits feature a radial concave flute. Drill bits feature a radial concave flute. Irwin drill bits have laser-marked sizes for simple identification. Drill bit is engineered with M-35-grade cobalt steel for maximum life when drilling in tough steel. Includes #1c, #2c and #3C bits. Includes #1c, #2c and #3C bits. Speedpoint tip for fast starts. Speedpoint tip for fast starts.
BrandIrwin Tools #ad
ManufacturerIRWIN #ad
Height1.63 Inches
Length7.75 Inches
Weight0.42 Pounds
Width5.5 Inches
Part Number10502CB

7. CO-Z


CO-Z Large HSS Spiral Groove Step Drill Bit, 12 Sizes Titanium High Speed Steel 1/4" to 2-3/8" Drill Bit for Sheet Aluminium Metal Wood Hole Drilling, Big Multiple Hole Stepped Up Bit for DIY Lovers

CO-Z #ad - The titanium coating makes the drill bit more durable so that it can last for years with uncompromised quality. The step drill bit is made from upgraded high speed steel characterized by well-balanced toughness, wear resistance and red hardness properties for better and faster hole -drilling performance.

Our drill bit is bigger in size so it can drill holes with larger dimensions. 12 hole sizes: 1/4; 3/8; 19/32; 3/4; 1'; 1'3/16; 1'3/8; 1'5/8; 1'3/4; 2'; 2'3/16; 2'3/8. The rapid strike tip drills twice as fast as the average step drills and can drill acrylic, wood, PVC, aluminum and iron sheets up to 0.2’’ in thickness. The dual-flute design prevents metal fillings from flying around and clears chips faster thus it can drill more smoothly without heating up.
BrandCO-Z #ad
ManufacturerCO-Z #ad
Part NumberSDB0001TA

8. Irwin Tools


12-Steps Cobalt Step Drill Bit 1/16- Inch Steps, Irwin Industrial Tools 10234CB #4 Unibit 3/16- Inch – 7/8-Inch

Irwin Tools #ad - Drills 12 different hole sizes, from 3/16" to 7/8" by 16ths. Speedpoint tip prevents "walking, " gets fast starts, and eliminates the need for pilot/starting hole. Single-flute cutting edge drills true round holes with smooth, clean finish. Cobalt high speed steel for extended cutting edge life makes it ideal for drilling stainless steel.
BrandIrwin Tools #ad
ManufacturerIRWIN #ad
Height0.98 Inches
Length7.13 Inches
Weight0 Pounds
Width3.13 Inches
Part Number10234cb

9. Powerextra


Step Drill Bit Set & Automatic Center Punch 5pcs HSS Cobalt Titanium Step Drill Bit Set, Multiple Hole 50 Sizes High Speed Step Drill Bit Set with Aluminum Case

Powerextra #ad - Chuck sizes. 135 degree split point and two-flute design:the drill bit point is designed as X-shape with 135 degree, which can prevent the drill slipping while working in high speed. High quality and widely use: the step drill bits are make by high speed steel, strong and durable can used for stainless steel sheet, aluminum alloy, plastic material and wood.

Automatic center punch & aluminum case: the center punch help you mark the center point that you want to drill, with exquisite aluminum case protects the drill bits not easy to dull and prolongs the drills lifespan. Titanium coating: the titanium coating resists the drill bits from corrosion and rust, copper, aluminum, stainless steel, deduces friction making it easily to do multiple drills on surfaces such as plastic, and other types of sheet metal.5

50 sizes in 5 pieces step drill bits: the bits set includes five standard step drill bits that can replace 50 individual drill bits and process 50 different kinds of diameter holes, compatibility with 1/4, 3/8 and 1/2 in. With two-flute design, provides a faster and smoother cutting.
BrandPowerextra #ad
ManufacturerPowerextra #ad
Height1.5 Inches
Length5.9 Inches
Width5.1 Inches
Part NumberPA-GS6009

10. Segomo Tools


Segomo Tools 5 Piece SAE Multiple Hole 50 Sizes HSS Cobalt Step Drill Bit Set with Aluminum Case

Segomo Tools #ad - 10 steps: 1/4, 1-1/4, 5/8, 9/16, 7/16, 3/8, 3/8, 7/16, 5/16, 1, 1/4, 3/4, 5/32, 7/8. Set includes: drill bit 1: 3/8". Drill bit 4: 1/4". The bits come supplied in an organized aluminum case for easy storage and transport.

Drill bit 3: 3/8". Made from high speed steel 4241 with titanium coating for long life and easy cutting/drilling through steel sheets, wood board, aluminum sheets, plastic board etc.5 piece step drill bit set 50 sizes in total with non-walking drill tips. Drill bit 2: 3/8". 9 steps: 1/4, 5/16, 11/16, 3/4.6 steps: 3/16, 7/32, 5/8, 1/4, 1/4, 3/8, 9/32, 3/8, 9/16, 7/16, 3/8, 5/8, 5/16, 15/32, 1/2, 11/32, 1/2, 13/32, 1-3/8. Drill bit 5: 1/4". Different sized shanks ensure full compatibility with 1/4, 3/8 and 1/2 inch chuck sizes. 13 steps: 1/8, 13/16, 7/8, 1-1/8, 11/16, 3/4, 5/16, 1/2. 12 steps: 3/16, 1/2, 7/16, 3/16, 1/2.
BrandSegomo Tools #ad
ManufacturerSegomo Tools #ad
Weight1.05 Pounds
Part NumberSDS5SAE