Skip to content
A set of five cobalt step drill bits is displayed inside an aluminum case with a black lining.
Product parameters table showing dimensions and weights for a step drill bit set.
A silver aluminum case containing a 5-piece cobalt step drill bit set.
A set of five cobalt step drill bits is displayed inside an aluminum case with a hinged lid.
A set of five cobalt step drill bits with gold-colored shafts stored in an aluminum case.
A set of five step drill bits in various sizes and lengths, labeled S, M, L, and XL, with a StoneGo brand logo visible.
A set of five cobalt step drill bits is shown with an aluminum case and a scale marked from 8 to 20.
A set of five step drill bits in sizes S, M, L, and XL, showing various diameters and lengths.
A set of five cobalt step drill bits is shown with various drilling applications including wood, iron, thin steel, and alumin
Close-up view of a black step drill bit showing markings and a buffer strip on each scale.
A single black step drill bit measuring 4 to 12 millimeters.
A set of 10 step drill bits ranging from 4 to 20mm, packaged in an aluminum case.
A single black step drill bit measuring 3 to 12 millimeters.
A single XL step drill bit, 4-32mm, with a black and silver finish.
A set of five cobalt step drill bits is displayed inside an aluminum case with a hinged lid.
1 / 15

5-Piece Cobalt Step Drill Bit Set with Aluminum Case

Regular price €58,99 Sale price €48,99

This 5-piece step drill bit set replaces up to 50 individual bits, giving you the versatility to drill perfectly sized holes in a range of materials. Crafted from cobalt high-speed steel with...

Buy more, save more

Discount applies automatically in your cart. No code needed.

Free standard shipping Tracking included Secure checkout

Chat with us

Why customers love it

Drill 50 hole sizes with one versatile set

This 5-piece cobalt step drill bit set replaces up to 50 individual bits, letting you drill perfectly sized holes in sheet metal, aluminum, wood, and plastic with ease.

  • Set of 5 cobalt steel bits replaces up to 50 individual drill bits
  • Titanium coating enhances durability and extends tool life
  • Two-flute design delivers faster, smoother, and cleaner cuts
  • Covers hole sizes from 1/8 inch to 1-3/8 inch
  • Step design eliminates the need for separate pilot bits on smaller sizes
  • Includes a durable aluminum storage case for organization and portability
A set of five cobalt step drill bits is displayed inside an aluminum case with a black lining.

Why you'll love this step drill bit set

One set, many sizes

Five cobalt steel bits replace up to 50 individual drill bits, so you can handle a wide range of hole sizes without a bulky collection.

Built to last

The titanium coating enhances durability and extends tool life, keeping your bits sharp through repeated use.

Cleaner, faster cuts

The two-flute design delivers faster, smoother, and cleaner cuts, while hex shanks prevent slipping in the drill chuck.

Organized and portable

A durable aluminum storage case keeps your bits organized and easy to transport to any job site.

Setup

Easy to use

  1. Select the right step

    Each step is clearly labeled with its diameter, so you can quickly identify the exact hole size you need.

  2. Drill without a pilot bit

    The step design eliminates the need for separate pilot bits on smaller sizes, letting you drill directly.

  3. Drill your hole

    Advance the bit through the material until you reach the labeled step that matches your desired hole size.

Specs

The details that matter

Material
Cobalt high-speed steel with titanium coating
Number of pieces
5
Hole size range
1/8 inch to 1-3/8 inch
Shank type
Hex
Flute design
Two-flute

More details

This 5-piece step drill bit set replaces up to 50 individual bits, giving you the versatility to drill perfectly sized holes in a range of materials. Crafted from cobalt high-speed steel with a titanium coating, these bits offer exceptional durability and lasting sharpness.

  • Set of 5 cobalt steel bits replaces up to 50 individual drill bits
  • Titanium coating enhances durability and extends tool life
  • Two-flute design delivers faster, smoother, and cleaner cuts
  • Covers a wide range of hole sizes from 1/8" to 1-3/8"
  • Step design eliminates the need for separate pilot bits on smaller sizes
  • Hex shanks prevent slipping in the drill chuck
  • Each step is clearly labeled with its diameter for quick identification
  • Includes a durable aluminum storage case for organization and portability

Ideal for HVAC professionals, electricians, and DIY enthusiasts working with sheet metal, aluminum, wood, and plastic.

Frequently asked questions

Everything you might want to know before you order.

What hole sizes can this set drill?

This 5-piece set covers a wide range of hole sizes from 1/8 inch to 1-3/8 inch, so you can handle most common drilling tasks.

Who is this step drill bit set ideal for?

It is ideal for HVAC professionals, electricians, and DIY enthusiasts working with sheet metal, aluminum, wood, and plastic.

Do I need a pilot bit for smaller holes?

No, the step design eliminates the need for separate pilot bits on smaller sizes, so you can drill directly.

How do I identify the right hole size on the bit?

Each step is clearly labeled with its diameter, allowing for quick identification of the exact hole size you need.

How do delivery and returns work?

Shipping

Free standard shipping

To Germany: 1–3 business days processing, then 5–12 business days in transit. Estimates, not guaranteed dates.

Your dispatch email includes a tracking link. Contact us if it has not arrived within 5 business days of ordering.

Outside the EU, import duties and local taxes may be payable on delivery. See the shipping policy for supported destinations and conditions.

Returns

Request a return within 14 days of delivery. Standard eligible returns must meet the policy conditions; a €4 prepaid-label fee is deducted from the refund. Return shipping is free for faulty, damaged or incorrect items. Contact us promptly if something is wrong. Your mandatory consumer rights are unaffected.

Shipping policy · Return & refund policy

Have a question? Contact us

Product reviews · Judge.me

Read it from other buyers

  • 5 stars: 19 (66%)
  • 4 stars: 5 (17%)
  • 3 stars: 0 (0%)
  • 2 stars: 2 (7%)
  • 1 star: 3 (10%)
J
Joseph Runte

The tip came broken, which makes the product unusable. It came only in a plastic packaging that protects the product from damage. I requested a refund and will return the product.

J
Johna Williamson

Good parts, I like the quality they have.

S
Santo Murray

All right, test if it's effective as stated, then I'll come back to talk.

L
Lorenzo VonRueden

all 👌

L
Lieselotte Zboncak

I'm very satisfied, it does what it's supposed to do.

R
Rocky Feil

Very good, works perfectly, thank you.

A
Ahmed Balistreri

Package received quickly and products were clean in their packaging.

R
Rocco Robel

Perfect, just as shown in the advertisement.

C
Candace Bayer

Everything is absolutely perfect, thank you very much.

J
Jung Luettgen

Good purchase.

V
Van Oberbrunner

For now, I can only say that it arrived early and that the product matches the description.

S
Sun Sauer

I haven't tried it yet, if it doesn't work well, I will leave new comments.

L
Leonora Goodwin

It doesn't cut metal well. It can't drill into thin sheet metal of a car.

E
Ezequiel Feil

Very good

C
Cheryle Fritsch

A bit dull even for plastic

C
Crystle Kub

What is aluminum non-piercing?

D
Danica Orn

Good quality

J
Jerrod Franecki

Great product, super fast delivery.

L
Lavon Bednar

excellent for all sizes, exactly what I wanted

C
Claude Green

For me it's perfect because in drill in plastic.

S
Stella Kozey

As described very genuine

G
Gale Mueller

Excellent product, very satisfied

K
Kevin Leuschke

Worked 4 times, then threads are dead already, crap

B
Bruna Senger

Awesome product

U
Ulrike Turcotte

It seems to be of excellent quality. I haven't used it yet though...

G
Gavin Bechtelar

The first use on plastic and it heats up but doesn't work well; not yet tested on another material.

S
Sid Morar

item as described fast shipping recommended seller

R
Rutha Bergstrom

good

O
Omer Hammes

I am very satisfied.