Which materials can this step drill bit cut?

It is suitable for ferrous and non-ferrous metals, stainless steel, copper, brass, aluminium, and plastics up to 4 mm thick.

What hole sizes does this step drill bit cover?

It features 9 steps designed for PG sizes ranging from PG 7 to PG 21 (9 mm to 28 mm).

Do you need to centre-punch or pre-drill first?

No, the Rapid Strike tip centres immediately on contact, preventing walking without any need for pre-drilling.

What type of shank does this bit have?

It has a 3-flat shank that prevents slipping inside the chuck and ensures maximum torque transmission.

How do you maximise the tool life when drilling metal?

Applying a suitable cutting fluid or coolant during drilling reduces heat build-up and tool wear.

MILWAUKEE 48899321 step drill bit PG 7 - PG 21

Name: MILWAUKEE 48899321 step drill bit PG 7 - PG 21
Brand: MILWAUKEE
SKU: 02883348
Price: 66.6 EUR
Availability: PreOrder

Supplier number: MILWAUKEE 48899321 | EAN 0045242364060

Recommended Retail Price €134.55

66.60 tax incl.

€55.04 excl. VAT (incl. all environmental contributions)

On order: delivered from 09/10/2026

Delivery by DHL

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How does it work?

Buy Milwaukee products with a total order value of at least €250 excl. VAT.
For a total order value of €250 excl. VAT up to but excluding €500 excl. VAT, you receive a FREE Milwaukee 12-piece Tri-Lobe screwdriver set (4932472003) worth €55.90.
For a total order value of €500 excl. VAT up to but excluding €750 excl. VAT, you receive a FREE Milwaukee M18 125 mm Random Orbital Sander cordless random orbital sander (4933464228) worth €168.90.
For a total order value of €750 excl. VAT or more, you receive a FREE Milwaukee M18 FUEL 125 mm cordless angle grinder with slide switch and brake worth €357.90.
The free item is automatically added to your order. No registration is required.
This promotion cannot be combined with the ongoing Milwaukee Cashback Promotion on Milwaukee hand tools. An invoice for which you receive a free Buy More, Get More gift therefore cannot also be submitted for the Milwaukee hand tools cashback promotion.
The promotion is valid from 01.10.2026 to 31.10.2026.
Milwaukee Buy More, Get More deals are recognisable by the promotion label on the product page. Click the label to view all available deals.

Clean drilling with Milwaukee

Practical benefits

Drill and deburr simultaneously: You create clean holes and automatically deburr metal edges in one smooth operation.
Accurate start without walking: The centering tip bites immediately on contact, eliminating the need to punch or pre-drill.
Secure fit in chuck: The flatted shank prevents slipping during heavy resistance and delivers maximum torque transmission.

In a nutshell

The right choise for

With the Milwaukee 48899321 step drill bit, you drill and deburr sheet materials in one single operation. Featuring 9 steps designed for pg sizes ranging from pg 7 through pg 21 (9 mm to 28 mm), it eliminates the need to carry multiple twist drills or hole saws for cable gland installations. The Rapid Strike tip bites instantly on contact, ensuring an accurate start without walking, center-punching, or pre-drilling. Its 3-flat shank delivers maximum torque transmission while preventing slipping in the chuck. It effortlessly handles ferrous and non-ferrous metals, stainless steel, aluminum, brass, copper, and plastics up to 4 mm thick.

Product information FAQ

€66.60

tax incl.

Key features according to our expert

Shank size: 6 mm

Product description

Step drills are ideal for drilling into the following materials: - Ferrous & non-ferrous sheets metals, profiles and pipes. - Copper, brass and aluminium. - Stainless steel. - Plastics. - Maximum material thickness 4 mm. - To ensure best lifetime we recommend the use of a coolant.
Trades: - Electrical: drilling of panels and cabinets for cable gland installation. - Plumbing / HVAC: access holes for pipework and installation. - Metal workers / fabrication: various sizes and hole enlargement. - Automotive: holes for cable installation (mobile telephones, antennas, re-directing electrical wiring). - Maintenance repair operations: various applications, sizes and hole enlargement.
Step Drill advantages over conventional drill bits: - One drill bit to drill multiple sizes - Do more carry less! - Best option for enlarging existing holes. - More durable than twist drill bits, thick core resists breakage. - More accurate and less walking, tip starts on contact. - Clean burr free holes, less reaming required. - Drills plastic without splitting or cracking.
MILWAUKEE Advantages
Spot drill - Drill - Deburr - All in one go
RAPID STRIKE TIP: Accurate start without walking and fast drilling without the need to pre-drill the material.
Special tip and step geometry for jam-free performance - less risk of drill snagging when used with high speed cordless tools and also prevents deformation of the drilled material.
Optimised 2 flute ground sharpened edge geometry for 2 x faster and smoother cutting.
Produced from custom engineered steel with black oxide coating for 4 x longer life.
Optimised for use with high speed cordless drills.
Laser engraved size markings for best long term visibility.
Each step is relief ground to drill and deburr automatically.
With 3 flat secure grip to prevent step drill from slipping in the chuck and ensure maximum transmission of torque.

All Features

Shank size: 6 mm
Number of steps: 9
Overall length (mm): 68
Shaft diameter (mm): 10

Brand MILWAUKEE
02883348
EAN 0045242364060
Supplier number MILWAUKEE 48899321

Frequently asked questions about this product

Answered by specialists

Which materials can this step drill bit cut?: It is suitable for ferrous and non-ferrous metals, stainless steel, copper, brass, aluminium, and plastics up to 4 mm thick.
What hole sizes does this step drill bit cover?: It features 9 steps designed for PG sizes ranging from PG 7 to PG 21 (9 mm to 28 mm).
Do you need to centre-punch or pre-drill first?: No, the Rapid Strike tip centres immediately on contact, preventing walking without any need for pre-drilling.
What type of shank does this bit have?: It has a 3-flat shank that prevents slipping inside the chuck and ensures maximum torque transmission.
How do you maximise the tool life when drilling metal?: Applying a suitable cutting fluid or coolant during drilling reduces heat build-up and tool wear.