What screw type is this bit designed for?

This bit is designed for cross-recess screws with a PH 1 Phillips drive.

What shank connection does this Wera bit have?

It features a standard 1/4" hexagon drive fitting DIN ISO 1173-D 6.3 holders.

What is the benefit of the TZ torsion zone?

The torsion zone absorbs peak torque loads, preventing premature wear and extending bit life.

How many bits are included in this pack?

The pack contains 2 identical PH 1 bits, each measuring 25 mm in length.

Is this bit VDE certified for electrical work?

No, this bit is not VDE tested and is not insulated for live electrical work.

WERA 851/1 TZ SB SiS bit Phillips, PH 1 x 25 mm (2 pcs) - 05073323001

Name: WERA 851/1 TZ SB SiS bit Phillips, PH 1 x 25 mm (2 pcs) - 05073323001
Brand: WERA
SKU: 02818388
Price: 6.64 EUR
Availability: InStock

Supplier number: WERA 05073323001 | EAN 4013288029249

6.64 tax incl.

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

On stock - immediately available | we have 2 products in stock.

blister

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Reliable screwdriving with Wera bits

Practical benefits

Extended bit service life: The built-in torsion zone cushions kinetic peak loads so you prevent premature wear during intense screwdriving.
Tough design prevents breakage: You avoid sudden bit tip breakage when driving into hard materials thanks to the tough-absorbing steel composition.
Universal hexagonal drive fit: The standard 1/4" hexagon connection allows you to fit the bit securely into standard holders and power tools.

In a nutshell

The right choise for

With the Wera 851/1 tz screwdriver bits, you tackle fastening jobs involving PH1 cross-recess screws with total confidence. The integrated torsion zone cushions peak torque loads during demanding drives, preventing premature tip wear and unexpected breakage. Thanks to the tough-absorbing design, these bits deliver dependable strength when fastening into hard materials such as wood, sheet metal, or plastic. The standard 1/4" hexagonal drive fits securely into any conventional bit holder or cordless screwdriver for quick tool changes. This practical 2-piece pack of 25 mm bits gives you the durability you need for assembly, maintenance, and everyday installation work.

Product information FAQ

€6.64

In stock - tax incl.

Key features according to our expert

Length: 25 mm
Drive profile size (bit): 1
Blade thickness: Not applicable
Type of drive profile (bit): Phillips
Connection size (bit): 1/4"
VDE approved: No
Bit profile: PH1
Number per blister: 2

Scope of delivery

851/1 TZ SB bits, PH 1 x 25 mm, 2 pieces
2x 851/1 TZ bits: PH 1 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): 1
Blade thickness: Not applicable
Type of drive profile (bit): Phillips
Connection size (bit): 1/4"
Vde approved: No
Bit profile: PH1
Number per blister: 2

Brand WERA
02818388
EAN 4013288029249
Supplier number WERA 05073323001

Frequently asked questions about this product

Answered by specialists

What screw type is this bit designed for?: This bit is designed for cross-recess screws with a PH 1 Phillips drive.
What shank connection does this Wera bit have?: It features a standard 1/4" hexagon drive fitting DIN ISO 1173-D 6.3 holders.
What is the benefit of the TZ torsion zone?: The torsion zone absorbs peak torque loads, preventing premature wear and extending bit life.
How many bits are included in this pack?: The pack contains 2 identical PH 1 bits, each measuring 25 mm in length.
Is this bit VDE certified for electrical work?: No, this bit is not VDE tested and is not insulated for live electrical work.