Which drill diameters are included in this Hikoki step drill set?

The 3-piece set includes drills spanning 4-12 mm, 4-20 mm, and 6-30 mm, covering hole sizes from 4 mm up to 30 mm.

What material are these drill bits made of?

They are made from high-speed steel (HSS) with a ground spiral flute for smooth chip removal.

Do you need to pilot drill before using these step drills?

No, the tip and stepped profile allow you to start and enlarge holes directly without pre-drilling.

What are these step drill bits typically used for?

Step drills are ideal for drilling and deburring clean, round holes in sheet metal and thin materials.

How many bits are included in this set?

The Hikoki 780109 set contains 3 step drill bits.

HIKOKI 780109 HSS step drill set d.4-12 / 4-20 / 6-30mm 3-piece

Name: HIKOKI 780109 HSS step drill set d.4-12 / 4-20 / 6-30mm 3-piece
Brand: HIKOKI
SKU: 08061167
Price: 118.8 EUR
Availability: PreOrder

Supplier number: HIKOKI 780109 | EAN 8717574055641

Recommended Retail Price €206.40

118.80 tax incl.

€98.18 excl. VAT (incl. all environmental contributions)

On order: delivered from 06/10/2026

set

Delivery by DHL

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Accurate drilling with Hikoki step drills

Practical benefits

Three versatile drill sizes: With diameters from 4 to 30 mm, you drill varied hole sizes without changing tools.
Smooth and efficient chip removal: The ground spiral flute ensures smooth operation and clean cutting through sheet metals and plastics.
Durable high speed steel: Thanks to the tough HSS build, you gain lasting durability during demanding drilling tasks.

In a nutshell

The right choise for

With the Hikoki 780109 hss step drill set, you drill precise holes from 4 to 30 mm without constantly swapping tools. This 3-piece set covering 4-12 mm, 4-20 mm, and 6-30 mm centers automatically, eliminating the need for pilot drilling. The ground spiral flute ensures smooth operation and efficient chip removal through thin sheet metal and plastics. Crafted from durable hss steel, it lets you create clean, burr-free holes and enlarge existing openings without deforming or tearing the workpiece.

Product information FAQ

€118.80

tax incl.

Key features according to our expert

Smallest diameter: 4 mm
Largest diameter: 30 mm
Drill set type: Stair drill set
Quantity per set: 3

Product description

Step drills set HSS 3-piece D.4-12 / 4-20 / 6-30MM

All Features

Smallest diameter: 4 mm
Largest diameter: 30 mm
Drill set type: Stair drill set
Quantity per set: 3
Content: 3 st.
Diameter (mm): 4-12 / 4-20 / 6-30
Implementation: HSS ground spiral

Brand HIKOKI
08061167
EAN 8717574055641
Supplier number HIKOKI 780109

Frequently asked questions about this product

Answered by specialists

Which drill diameters are included in this Hikoki step drill set?: The 3-piece set includes drills spanning 4-12 mm, 4-20 mm, and 6-30 mm, covering hole sizes from 4 mm up to 30 mm.
What material are these drill bits made of?: They are made from high-speed steel (HSS) with a ground spiral flute for smooth chip removal.
Do you need to pilot drill before using these step drills?: No, the tip and stepped profile allow you to start and enlarge holes directly without pre-drilling.
What are these step drill bits typically used for?: Step drills are ideal for drilling and deburring clean, round holes in sheet metal and thin materials.
How many bits are included in this set?: The Hikoki 780109 set contains 3 step drill bits.