What is the purpose of the bore hole in these Torx bits?

The bore hole (BO) fits over the central pin in tamper-proof Torx screws, allowing you to fasten and loosen security screws.

Can these bits also be used with standard Torx screws?

Yes, Torx BO bits fit both tamper-proof security screws with a pin and standard TX 20 screws.

What type of drive do these bits have?

They feature a standard 1/4" hexagon drive (Wera connecting series 4), suitable for holders per DIN ISO 1173-F 6.3 and power tools.

What is the advantage of the 70 mm length?

The 70 mm length provides extended reach for deeply set or hard-to-access screws.

How many bits are included in this set?

This set contains 2 pieces of TX 20 x 70 mm bits.

WERA 867/4 Z TORX BO SB bits with bore SB, TX 20 x 70 mm (2 pcs) - 05073070001

Name: WERA 867/4 Z TORX BO SB bits with bore SB, TX 20 x 70 mm (2 pcs) - 05073070001
Brand: WERA
SKU: 03177051
Price: 22.2 EUR
Availability: PreOrder

Supplier number: WERA 05073070001 | EAN 4013288202604

Recommended Retail Price €39.52

22.20 tax incl.

€18.35 excl. VAT (incl. all environmental contributions)

On order: delivered from 27/10/2026

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The minimum purchase order quantity for the product is 5.

Ordered before 20:00 - delivered as of 27/10/2026
Shipping costs €6.99 VAT included | Free shipping for orders over a total amount of 125 euros
Delivery by DHL
Delivered from Belgium

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Secure fastening with Wera bits

Practical benefits

Built for security screws: The bore hole profile allows you to drive tamper-proof fasteners with a safety pin smoothly.
Tough design prevents breakage: The tough-absorbing steel construction prevents premature tip breakage when working with hard materials and challenging joints.
Reach into deep recesses: With an overall length of 70 mm, you access sunken screws effortlessly using any standard 1/4" holder.

In a nutshell

The right choise for

With the Wera 867/4 z Torx bo bits, you can fasten and loosen security screws with a central pin smoothly and securely. The integrated bore hole profile fits tamper-proof fasteners perfectly while remaining fully compatible with standard tx 20 screws. Built with a tough-absorbing design, these bits prevent premature tip breakage during demanding jobs in hard materials. The extended 70 mm length provides effortless reach into deeply recessed areas without needing extra extensions. This set includes 2 bits featuring a standard 1/4" hexagon drive for power tools and bit holders.

Product information FAQ

€22.20

tax incl.

Key features according to our expert

Length: 70 mm
Drive profile size (bit): 20
Blade thickness: Not applicable
Type of drive profile (bit): Torx
Connection size (bit): 1/4"
VDE approved: No
Bit profile: T20

Scope of delivery

867/4 Z TORX® BO SB bits with bore hole, TX 20 x 70 mm, 2 pieces
2x 867/4 Z TORX® BO bits with bore hole: TX 20 x 70 mm

Product description

Premium bits for TORX® socket screws. The hole in the bit and the pin in the TORX® BO screw prevent unauthorized loosening. Safety connection. Tough, for universal use. 1/4" hexagonal, suitable for holding tools as per DIN ISO 1173-D 6.3.

For recessed TORX® screws with securing pin
TORX® bit with bore hole on the output side
Tough for hard materials
1/4" hexagon drive (Wera connecting series 4)

Application

TORX® socket screws with safety pin (BO = with bore hole)

Drive

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

Design

TORX® with bore hole, tough, for universal use

Features and benefits

TORX® tools with a borehole prevent the unauthorised unfastening of safety screws. The screws contain a pin that protrudes into the drive profile so that "normal" TORX® tools cannot be used. This pin fits into the borehole of TORX® BO tools allowing safety screws to be unfastened.
Tough Wera bits prevent the tip from breaking prematurely. Z-bits usually are the bit for universal screwdriving applications.

All Features

Length: 70 mm
Drive profile size (bit): 20
Blade thickness: Not applicable
Type of drive profile (bit): Torx
Connection size (bit): 1/4"
Vde approved: No
Bit profile: T20

Brand WERA
03177051
EAN 4013288202604
Supplier number WERA 05073070001

Frequently asked questions about this product

Answered by specialists

What is the purpose of the bore hole in these Torx bits?: The bore hole (BO) fits over the central pin in tamper-proof Torx screws, allowing you to fasten and loosen security screws.
Can these bits also be used with standard Torx screws?: Yes, Torx BO bits fit both tamper-proof security screws with a pin and standard TX 20 screws.
What type of drive do these bits have?: They feature a standard 1/4" hexagon drive (Wera connecting series 4), suitable for holders per DIN ISO 1173-F 6.3 and power tools.
What is the advantage of the 70 mm length?: The 70 mm length provides extended reach for deeply set or hard-to-access screws.
How many bits are included in this set?: This set contains 2 pieces of TX 20 x 70 mm bits.

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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