Which hole diameters can you drill with this step drill?

It features 13 steps from 5 to 35 mm: 5, 7.5, 10, 13, 16, 19, 21, 23, 26, 29, 31, 33, and 35 mm.

Which materials is the Irwin 10502854 suitable for?

It is designed for thin materials such as sheet steel, copper, brass, aluminium, plastic, and wood.

Do you need to centre punch before drilling?

No, the self-centring point prevents walking and eliminates the need for centre punching.

What type of shank does this drill bit have?

It features a 10 mm flatted shank that prevents slipping inside the drill chuck.

IRWIN 10502854 step drill 5M with 13 hole sizes 5-35 mm, 2-3 mm increments

Name: IRWIN 10502854 step drill 5M with 13 hole sizes 5-35 mm, 2-3 mm increments
Brand: IRWIN
SKU: 51070133
Price: 55.2 EUR
Availability: InStock

Supplier number: IRWIN 10502854 | EAN 0038548111056

Recommended Retail Price €105.78

55.20 tax incl.

€45.62 excl. VAT (incl. all environmental contributions)

On stock - immediately available | we have 6 products in stock.

Ordered before 20:00 - delivered as of 06/10/2026
Shipping costs €11.99 VAT included | Free shipping for orders over a total amount of 125 euros
Delivery by DHL

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Precise drilling across multiple diameters

Practical benefits

Thirteen hole sizes combined: With thirteen incremental steps from 5 MM to 35 MM, you cut different hole dimensions without changing bits.
Controlled and clean enlargement: The rising 2 MM to 3 MM increments deliver smooth material removal and produce burr-free edges in sheet metal.
Fast and efficient operation: You save valuable time on jobs because spot drilling is eliminated while each step cleanly finishes the opening.

In a nutshell

The right choise for

With the Irwin 10502854 step drill bit 5m, you tackle thirteen distinct hole sizes from 5 MM to 35 MM without changing bits. The self-centring point stops bit wander in its tracks, eliminating the need for spot drilling or centre punching. Rising increments of 2 MM to 3 MM guarantee smooth, controlled material removal and automatically deburr hole edges as you cut. This delivers clean, distortion-free results across sheet steel, copper, brass, aluminium, plastic, and wood, making it ideal for installing cable glands and entries in electrical enclosures. Thanks to the 10 MM flatted shank, you avoid slippage in the drill chuck and maintain complete control on every job.

Product information FAQ

€55.20

In stock - tax incl.

Key features according to our expert

Smallest diameter: 5 mm
Largest diameter: 35 mm

Product description

Designed for precise drilling in thin materials
Self-centring tip does not slip and eliminates the need for hammering a centring point
Chrome vanadium steel drill body is hardened to 56 HRC for long life
Double ground cutting edge with single chip screw for extra chip capacity, drilling truly round holes and maximum step control
Suitable for mild steel, copper, brass, aluminium, plexiglass, plastic, wood and laminate
Flattened shank prevents the drill head from slipping in the chuck
Laser-etched dimensions in the chip flute for easy and permanent hole size determination

All Features

Smallest diameter: 5 mm
Largest diameter: 35 mm

Brand IRWIN
51070133
EAN 0038548111056
Supplier number IRWIN 10502854

Frequently asked questions about this product

Answered by specialists

Which hole diameters can you drill with this step drill?: It features 13 steps from 5 to 35 mm: 5, 7.5, 10, 13, 16, 19, 21, 23, 26, 29, 31, 33, and 35 mm.
Which materials is the Irwin 10502854 suitable for?: It is designed for thin materials such as sheet steel, copper, brass, aluminium, plastic, and wood.
Do you need to centre punch before drilling?: No, the self-centring point prevents walking and eliminates the need for centre punching.
What type of shank does this drill bit have?: It features a 10 mm flatted shank that prevents slipping inside the drill chuck.