Top 10 Graduated Drill Bit – Step Drill Bits

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1. Neiko

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High Speed Steel | 3-Piece Set | Total 28 Sizes, Neiko 10193A Titanium Step Drill Bit Set

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Neiko #ad - Titanium | high speed steel: 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.

Two-flute design: clears chips faster and allows particles to escape easily. 135° split point tip: increases cutting speed with self-centering and prevents walking. Tri-flatted shank: fits into power tools chuck securely and eliminates slip. Set includes: bit #1 6 steps: 3/16", 1/2", 5/16", 5/16", 3/8", 11/16", 5/16", 3/8", 1/2"; bit #3 9 steps: 1/4", 1/2"; bit #2 13 steps: 1/8", 15/32", 7/32", 9/32", 3/16", 13/32", 1/4", 7/16", 11/32", 9/16", 5/8", 1/4", 7/16", 3/8", 5/32", 7/16", 3/4".
BrandNeiko #ad
ManufacturerRidgerock Tools Inc. #ad
Height1 Inches
Length6 Inches
Weight0.02 Pounds
Width4 Inches
Part Number10193A
Model10193A

2. Neiko

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High Speed Steel | 1/4 to 1-3/8 | Total 10 Step Sizes, Neiko 10194A Titanium Step Drill Bit

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Neiko #ad - Titanium | high speed steel: 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. Two-flute design: clears chips faster and allows particles to escape easily. Tri-flatted shank: fits into power tools chuck securely and eliminates slip. 135° split point tip: increases cutting speed with self-centering and prevents walking. Includes 10 step sizes: 1/4", 3/4", 7/8", 1-1/8", 1", 3/8", 5/8", 1/2", 1-1/4", 1-3/8".
BrandNeiko #ad
ManufacturerRidgerock Tools Inc. #ad
Height1.6 Inches
Length6.1 Inches
Weight0.31 Pounds
Width2.9 Inches
Part Number10194A
Model10194A

3. COMOWARE

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Titanium Coated, High Speed Steel, Total 50 Sizes with Aluminum Case, Double Cutting Blades, COMOWARE Step Drill Bit Set & Automatic Center Punch- Unibit, Short Length Drill Bits Set of 5 pcs

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COMOWARE #ad - Meet your demands - with the step drill bits we offered, which greatly saves you a lot of trouble. Great for metal/wood/plastic countersunk. Suitable for home diy, you can process different kinds of diameter holes, and General Building/Engineering Use.

The two flute design provides a smoother cutting, allows the material particles escape easily for a much more clean drilling operation. Design - the split point tip is at 118 degrees to increase the wear resistance. Hss titanium coating - high speed steel along with titanium coating ensures outstanding durability and sharpness, can reduces the friction, runs cooler.

Easy organizing - a drill bits holder with size index is included in the metal kit for easy storage and organizing without fear of it falling out. Set includes - the drill bits set includes five common sizes for versatility, can fit the majority of brands currently on the market.
BrandCOMOWARE #ad
ManufacturerCOMOWARE #ad

4. CO-Z

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CO-Z HSS 5PCS Titanium Step Drill Bit Set with Automatic Center Punch, Multiple Hole Stepped Up Bits for DIY Lovers, 50 Sizes in 5 High Speed Steel Drill Bits Set for Sheet Metal with Aluminum Case

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CO-Z #ad - A must-have for handyman or professionals - Perfect for home repairs and light jobs such as drilling holes in plastic, aluminum, copper and many other types of sheet metal.

Hss steel construction - High-speed steel construction for longer cutting edge life even at extreme temperatures. Titanium coating - coated by titanium, this step drill set performs well in heat, corrosion and rust resistance. Automatic center punch - delivers an automatic, high-impact, spring-loaded strike when pressed against surface, adjustable cap regulates striking force.50 size in 5 - the bits set includes five standard step drill bits that can replace 50 individual drill bits.
BrandCO-Z #ad
ManufacturerCO-Z #ad
Part NumberSDB-2017-06

5. CO-Z

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1/4 to 1-3/8 Inches High Speed Steel Drill Cone Bits for Sheet Metal Hole Drilling Cutting, HSS Multi Size Hole Stepped Up Unibit for DIY Lovers Electrician, CO-Z 10 Sizes Titanium Step Drill Bit

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CO-Z #ad - A must-have for handyman or professionals - perfect for home repairs and light jobs such as drilling holes in plastic, copper, aluminum, iron and many other types of sheet metal excluding steel or any other harder metal.

Includes 10 step sizes - 1/4", 1/2", 5/8", 1", 1-1/8", 3/4", 3/8", 7/8", 1-1/4", 1-3/8". Hss & titanium coating - high-speed steel makes it last longer than others, aluminum sheets, copper & plastic & wood board and many other types of sheet metal with ease, titanium coating ensure easily cut through iron sheets, and it can automatically deburr holes while drilling to keep the drill bit clean.

Revolutionary design - tri-flatted shank fits into power tools chuck securely and eliminates slip; two-flute design clears chips faster and allows particles to escape easily. Titanium coating - coated with titanium, this step drill set performs well in heat, corrosion and rust resistance.
BrandCO-Z #ad
ManufacturerCO-Z #ad
Part NumberSDB-2017-01

6. Powerextra

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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

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Powerextra #ad - 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. Titanium coating: the titanium coating resists the drill bits from corrosion and rust, deduces friction making it easily to do multiple drills on surfaces such as plastic, copper, stainless steel, aluminum, and other types of sheet metal.

Chuck sizes. 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.

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. 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.
BrandPowerextra #ad
ManufacturerPowerextra #ad
Height1.5 Inches
Length5.9 Inches
Width5.1 Inches
Part NumberPA-GS6009

7. Irwin Tools

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Irwin Industrial Tools 10228 Unibit 228 Step Drill Bit Set 4-Piece

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Irwin Tools #ad - 3 flatted shank prevents slipping in drill chuck. Non-skid self-starting tip eliminates skidding and the need for center punching. Single-flute cutting edge for greater control through steps. Also available with titanium nitride coating for longer life. Available in fractional and metric sizes.
BrandIrwin Tools #ad
ManufacturerIRWIN #ad
Height1.5 Inches
Length8 Inches
Weight0.44 Pounds
Width5.5 Inches
Part Number10228
Model10228

8. Neiko

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5-Piece | High Speed Steel | SAE | Total 41 Sizes, Neiko 10169A Titanium Step Drill Bit Set with Automatic Center Punch

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Neiko #ad - Design: two-flute design deburrs during drilling, clearing chips faster and allowing particles to escape for cleaner operation.

Precise: automatic center punch creates spring-loaded high-impact strike against surfaces; red cap adjusts force. Includes: 2 1/4-inch shank step drill bits, 2 3/8-inch shank step drill bits, and 1 automatic center punch. Versatile: each step drill bit features a tri-flatted shank for a secure fit into power tool chucks, eliminating slip. Quality: classic high speed steel with titanium coating for drilling holes in plastic, stainless steel, copper, aluminum, and many other sheet metal types.
BrandNeiko #ad
ManufacturerNeiko #ad
Height4.72 inches
Length15.75 inches
Weight1.21 Pounds
Width7.95 inches
Part Number10169A
Model10169A

9. Neiko

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NEIKO 10185A Titanium Step Drill Bit | 3/16"

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Neiko #ad - Coating: titanium nitride coating allows to easily cut through aluminum and iron sheets, copper, plastic and wood boards and other types of sheet metal. Material: hss high speed steel and 4241# Titanium Nitride Coated. Shank: 3 flatted 3/8" Shank. Quality: made from high Speed Steel, this step drill bit is manufactured for fast hole drilling capabilities. Includes: ten sizes: 3/16" to 7/8" in 1/16" increments.
BrandNeiko #ad
ManufacturerRidgerock Tools Inc. #ad
Height0.98 Inches
Length2.36 Inches
Width5.71 Inches
Part Number10185A
Model10185A

10. MILWAUKEE'S

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No 9, Milwaukee Electric Tool 48-89-9209 Electric Step Drill Bit, Silver metallic

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MILWAUKEE'S #ad - For use in cordless drills in high speed. Highly visible reference marks make it easy to stop on any hole size. 7/8” and 1-1/8” step bit. 3-flat secure grip reduces slippage.
BrandMILWAUKEE'S #ad
ManufacturerTV Non-Branded Items (Home Improvement) #ad
Height2.1 Inches
Length6.9 Inches
Weight0.3 Pounds
Width5.9 Inches
Part Number48-89-9209
Model48-89-9209