What is the purpose of the Wera 8784 B1 Zyklop adaptor?

It allows you to use 1/4" hex drive bits with a 3/8" square drive tool, such as a Zyklop ratchet.

Which bits are compatible with this adaptor?

It fits 1/4" hex bits according to DIN ISO 1173-C 6.3 and E 6.3, as well as Wera connecting series 1 and 4.

Does this adaptor feature a quick-release chuck?

Yes, it features a quick-release chuck for rapid, effortless bit changes.

Is this adaptor magnetic?

No, this adaptor is not magnetic. The bits are secured mechanically in the chuck.

What is the total length of this adaptor?

The adaptor has an overall length of 44 mm.

WERA 8784 B1 Zyklop adapter, 3/8", 1/4" x 3/8" x 44 mm - 05003590001

Name: WERA 8784 B1 Zyklop adapter, 3/8", 1/4" x 3/8" x 44 mm - 05003590001
Brand: WERA
SKU: 41071382
Price: 17.6 EUR
Availability: PreOrder

Supplier number: WERA 05003590001 | EAN 4013288121301

Recommended Retail Price €35.55

17.60 tax incl.

€14.55 excl. VAT (incl. all environmental contributions)

On order: delivered from 13/10/2026

Delivery by DHL

✆ Talk to a specialist

Greater versatility with the Wera 8784 B1 adapter

Practical benefits

Drive bits with ratchets: You easily connect standard 1/4" bits directly to your 3/8" ratchet, turning it into a capable screwdriving tool.
Rapid bit change mechanism: The integrated quick-release chuck allows you to swap bits effortlessly, keeping your workflow smooth and productive.
Durable chrome vanadium steel: Built from robust chrome vanadium steel, this adapter withstands high torque demands during daily professional use.

In a nutshell

The right choise for

With the Wera 8784 B1 Zyklop adaptor, you easily turn your 3/8" ratchet into a versatile screwdriving tool. Measuring 44 mm in length, this adaptor connects a 3/8" square drive directly to a 1/4" hex chuck, allowing you to use standard screwdriver bits with your ratchet handle. The integrated quick-release chuck lets you swap bits in seconds so you can work smoothly without unnecessary interruptions. Constructed from robust chrome vanadium steel, it ensures dependable torque transfer during tough maintenance and assembly jobs.

Product information FAQ

€17.60

tax incl.

Key features according to our expert

Bit holder size: 1/4 inch
Connection size (machine): 3/8"
Connection type (machine): Internal square
With lock: No
Magnetic: No
Length: 44 mm
Product Range: Wera Zyklop

Scope of delivery

8784 B1 Zyklop bit adaptor, 3/8", 1/4" x 3/8" x 44 mm

Product description

Connector from square head to hexagonal. For 1/4" hexagon bits as per DIN ISO 1173-C 6.3 and E 6.3 and Wera connection series 1 and 4. With quick-release chuck.

3/8" Zyklop adaptor with quick-release chuck for rapid bit change
Suitable for 1/4" hex bits (Wera connecting series 1 and 4)
Chrome vanadium steel

Application

Suitable for 1/4" hex bits as per DIN ISO 1173-C 6.3 and E 6.3 and Wera series 1 and 4

Design

Quick-release chuck for fast bit changes, chromium vanadium

Features and benefits

All Features

Bit holder size: 1/4 inch
Connection size (machine): 3/8"
Connection type (machine): Internal square
With lock: No
Magnetic: No
Length: 44 mm
Product range: Wera Zyklop

Brand WERA
41071382
EAN 4013288121301
Supplier number WERA 05003590001

Frequently asked questions about this product

Answered by specialists

What is the purpose of the Wera 8784 B1 Zyklop adaptor?: It allows you to use 1/4" hex drive bits with a 3/8" square drive tool, such as a Zyklop ratchet.
Which bits are compatible with this adaptor?: It fits 1/4" hex bits according to DIN ISO 1173-C 6.3 and E 6.3, as well as Wera connecting series 1 and 4.
Does this adaptor feature a quick-release chuck?: Yes, it features a quick-release chuck for rapid, effortless bit changes.
Is this adaptor magnetic?: No, this adaptor is not magnetic. The bits are secured mechanically in the chuck.
What is the total length of this adaptor?: The adaptor has an overall length of 44 mm.