What type of screws are these bits suitable for?

These bits are designed for Phillips cross-recess screws with a PH 2 drive.

What drive connection do these bits have?

They feature a standard 1/4" hexagon drive according to DIN ISO 1173-D 6.3.

What is the benefit of the TZ torsion zone?

The torsion zone cushions torque peaks to prevent premature wear and extend service life.

How many bits are included in this pack?

The blister pack contains 2 pieces of Wera 851/1 TZ PH 2 bits measuring 25 mm.

Are these bits insulated for electrical work?

No, these bits are not VDE-certified and are not insulated for live electrical work.

WERA 851/1 TZ SB SiS bit Phillips, PH 2 x 25 mm (2 pcs) - 05073324001

Name: WERA 851/1 TZ SB SiS bit Phillips, PH 2 x 25 mm (2 pcs) - 05073324001
Brand: WERA
SKU: 02818391
Price: 6.64 EUR
Availability: InStock

Supplier number: WERA 05073324001 | EAN 4013288029256

6.64 tax incl.

€5.49 excl. VAT (incl. all environmental contributions)

On stock - immediately available | we have 8 products in stock.

blister

Ordered before 20:00 - delivered tomorrow 21/10/2026
Shipping costs €11.99 VAT included | Free shipping for orders over a total amount of 125 euros
Delivery by DHL

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Extended tool life with Wera torsion design

Practical benefits

Cushions peak torque loads: The built-in torsion zone absorbs excessive torque spikes so you avoid premature wear during fastening.
Tough viscous steel core: The ductile composition prevents bit tip breakage when you drive screws into hard materials.
Universal hexagonal drive fit: The standard 1/4" hex connection ensures you fit the bit securely into standard bit holders.

In a nutshell

The right choise for

With the Wera 851/1 tz ph 2 x 25 mm screwdriver bit, you handle demanding fastening tasks quickly and without interruption. The integrated torsion zone cushions extreme torque peaks, effectively preventing premature wear and bit breakage. Its tough-viscous design ensures the bit tip will not snap during demanding drives into hard materials. Thanks to the universal 1/4" hexagon drive, the bit fits securely into your standard bit holder. This blister pack contains 2 pieces of 851/1 tz ph 2 bits measuring 25 mm, ready for all your Phillips screwdriving jobs.

Product information FAQ

€6.64

In stock - tax incl.

Key features according to our expert

Length: 25 mm
Drive profile size (bit): 2
Blade thickness: Not applicable
Type of drive profile (bit): Phillips
Connection size (bit): 1/4"
VDE approved: No
Bit profile: PH2
Number per blister: 2

Scope of delivery

851/1 TZ SB bits, PH 2 x 25 mm, 2 pieces
2x 851/1 TZ bits: PH 2 x 25 mm

Product description

Premium bits for Phillips screws. Torque peaks are cushioned by the torsion shape. Premature wear is avoided and the service life of the bit is increased. Tough, for universal use. 1/4" hexagonal, suitable for holding tools as per DIN ISO 1173-D 6.3.

For Phillips screws
Torsion zone for absorption of peak loads
Enhanced service life of the bits
Tough for hard materials
1/4" hexagon drive (Wera connecting series 1)

Application

Phillips screws

Drive

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

Design

Torsion-style design to reduce premature wear, tough, for universal use

Features and benefits

TZ-Bits are tough bits with a torsion zone. Torsion bits absorb the damaging peak torque loads in the torsion zone. This prevents premature wear and enhances the service life of the bits.
Tough Wera bits prevent the tip from breaking prematurely. Z-bits usually are the bit for universal screwdriving applications.

All Features

Length: 25 mm
Drive profile size (bit): 2
Blade thickness: Not applicable
Type of drive profile (bit): Phillips
Connection size (bit): 1/4"
Vde approved: No
Bit profile: PH2
Number per blister: 2

Brand WERA
02818391
EAN 4013288029256
Supplier number WERA 05073324001

Frequently asked questions about this product

Answered by specialists

What type of screws are these bits suitable for?: These bits are designed for Phillips cross-recess screws with a PH 2 drive.
What drive connection do these bits have?: They feature a standard 1/4" hexagon drive according to DIN ISO 1173-D 6.3.
What is the benefit of the TZ torsion zone?: The torsion zone cushions torque peaks to prevent premature wear and extend service life.
How many bits are included in this pack?: The blister pack contains 2 pieces of Wera 851/1 TZ PH 2 bits measuring 25 mm.
Are these bits insulated for electrical work?: No, these bits are not VDE-certified and are not insulated for live 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!

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