What type of screws is this bit suitable for?

This bit is suitable for hexagon socket screws (hex/Allen) measuring 2.5 mm.

What is the advantage of the Hex-Plus profile?

Hex-Plus provides larger contact surfaces in the screw head to prevent rounding and damage to the screw.

What drive size does this Wera bit have?

It features a standard 1/4" hexagon drive according to DIN ISO 1173-F 6.3 (Wera connecting series 4).

What is the total length of this bit?

The total length of this bit is 89 mm.

Is this bit VDE-insulated for live electrical work?

No, this bit is not VDE-tested or insulated for electrical work.

WERA 840/4 Z Hex-Plus hexagon bit, 2.5 x 89 mm - 05059629001

Name: WERA 840/4 Z Hex-Plus hexagon bit, 2.5 x 89 mm - 05059629001
Brand: WERA
SKU: 02124647
Price: 8.2 EUR
Availability: PreOrder

Supplier number: WERA 05059629001 | EAN 4013288155467

Recommended Retail Price €15.85

8.20 tax incl.

€6.78 excl. VAT (incl. all environmental contributions)

On order: delivered from 15/10/2026

Ordered before 20:00 - delivered as of 15/10/2026
Shipping costs €11.99 VAT included | Free shipping for orders over a total amount of 125 euros
Delivery by DHL

✆ Talk to a specialist

Precise and durable driving with Wera

Practical benefits

Prevents damaged screw heads: The specialized profile provides larger contact surfaces so you avoid rounding out hexagonal screw recesses.
Extended reach for deep fasteners: With an 89 mm length, you easily access recessed screws without needing separate extension adapters.
Tough design prevents breakage: The ductile, tough construction protects the bit from premature snapping during demanding fastening into hard materials.

In a nutshell

The right choise for

With the Wera 840/4 z Hex-Plus hex bit, you tackle deep-seated 2.5 mm socket screws with precision and complete control. The extended 89 mm length lets you reach recessed fasteners effortlessly without requiring extra extension adapters. Engineered with the Hex-Plus profile, it provides larger contact surfaces inside the screw head to prevent rounding out and enable higher torque transfer. The tough, ductile design protects against premature bit snapping during demanding fastening into hard materials. Fitted with a standard 1/4" hexagon drive, it integrates smoothly into your cordless drill driver or bit holder for precision assembly, bicycle maintenance, and mechanical engineering tasks.

Product information FAQ

€8.20

tax incl.

Key features according to our expert

Length: 89 mm
Blade thickness: Not applicable
Type of drive profile (bit): Hexagon
Connection size (bit): 1/4"
VDE approved: No
Bit tip: HEX 2,5 mm
Drive profile size (bit): 2,5 mm
Product Range: Wera Hex-Plus

Scope of delivery

840/4 Z bits, 2.5 x 89 mm

Product description

Tough Wera bits for hexagonal socket screws, for universal use. Hex-Plus offers larger contact surfaces in the screw head. The notch effect is reduced to a minimum and the destruction of the screw is nearly eliminated. 1/4" hexagonal, suitable for holders as per DIN ISO 1173-F 6.3.

For hexagonal socket head screws
Hex-Plus allows socket head screws to live longer
Tough for hard materials
1/4" hexagon drive (Wera connecting series 4)

Application

Hexagon socket screws

Drive

1/4" hexagon, suitable for DIN ISO 1173-F 6.3 bit holders

Design

Hex-Plus, tough, for universal use

Features and benefits

Hexagon socket screws are a problem, because the contact surfaces that transfer the force of the tool to the screw are very narrow. The consequence: the head of the screw can be damaged, usually rounding out the recess. Hex-Plus tools have larger contact surfaces to prevent this, driving from the flats of the recess, rather than the corners. Good to know: Hex-Plus tools fit into every standard hexagon socket screw!
Tough Wera bits prevent the tip from breaking prematurely. Z-bits usually are the bit for universal screwdriving applications.

All Features

Length: 89 mm
Blade thickness: Not applicable
Type of drive profile (bit): Hexagon
Connection size (bit): 1/4"
Vde approved: No
Bit tip: HEX 2,5 mm
Drive profile size (bit): 2,5 mm
Product range: Wera Hex-Plus

Brand WERA
02124647
EAN 4013288155467
Supplier number WERA 05059629001

Frequently asked questions about this product

Answered by specialists

What type of screws is this bit suitable for?: This bit is suitable for hexagon socket screws (hex/Allen) measuring 2.5 mm.
What is the advantage of the Hex-Plus profile?: Hex-Plus provides larger contact surfaces in the screw head to prevent rounding and damage to the screw.
What drive size does this Wera bit have?: It features a standard 1/4" hexagon drive according to DIN ISO 1173-F 6.3 (Wera connecting series 4).
What is the total length of this bit?: The total length of this bit is 89 mm.
Is this bit VDE-insulated for live electrical work?: No, this bit is not VDE-tested or insulated for electrical work.

Questions about this product?

Our product specialists are happy to help with any questions about this range. Call, email or chat with us!

Chat with us

0800 0226 945 [email protected]