What is this bit holder used for?

The Gedore KB 619 allows you to use 1/4" hex screwdriver bits on power tools or ratchets with a 1/2" female square drive.

What connection does the drive end have?

The drive side has a 1/2" internal square drive according to DIN 3121 Form G.

Which bits are compatible with this adapter?

It fits standard 1/4" hex screwdriver bits conforming to DIN ISO 1173 and DIN 3126 - D 6.3.

What is the total length of this holder?

The total length of this bit holder is 35 mm.

Is this bit holder suitable for machine use?

Yes, it is designed for both hand and power tools. For power tool use, securing with a pin and retaining ring is recommended.

GEDORE KB 619 bit holder 1/4" hexagon - 1/2" square - 6524150

Name: GEDORE KB 619 bit holder 1/4" hexagon - 1/2" square - 6524150
Brand: GEDORE
SKU: 41892693
Price: 30.4 EUR
Availability: InStock

Supplier number: GEDORE 6524150 | EAN 4010886652411

Recommended Retail Price €51.62

30.40 tax incl.

€25.12 excl. VAT (incl. all environmental contributions)

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

Ordered before 20:00 - delivered tomorrow 03/10/2026
Shipping costs €11.99 VAT included | Free shipping for orders over a total amount of 125 euros
Delivery by DHL
Delivered from Belgium

✆ Talk to a specialist

Effortless bit adaptivity with Gedore

Practical benefits

Seamless socket bit conversion: You connect standard 1/4" hex screwdriver bits directly to your 1/2" square drive for versatile screwdriving.
Engineered for machine use: Manufactured to DIN 7427 Form A standards, it performs reliably with both hand-operated tools and powered screwdrivers.
Highly durable surface protection: The manganese-phosphated finish provides superior resistance against wear and corrosion during demanding daily workshop tasks.

In a nutshell

The right choise for

With the Gedore kb 619 bit holder, you connect standard 1/4" hex screwdriver bits directly to ratchets or power tools featuring a 1/2" internal square drive. This allows you to apply higher torque during heavy assembly or repair jobs without needing separate tool sets. Built according to din 7427 standards, this compact 35 mm adapter ensures dependable strength for both hand and machine use. Its manganese-phosphated finish provides superior resistance against wear and corrosion during demanding daily workshop tasks.

Product information FAQ

€30.40

In stock - tax incl.

Key features according to our expert

Bit holder size: 1/2 inch
Connection size (machine): 1/4"
Connection type (machine): Internal square
Length: 35 mm

Product description

Construction in accordance with
DIN 7427 form A
Hexagon socket according to DIN ISO 1173
Internal drive square Form G DIN 3121
For screwdriving machines or hand-operated tools
For machine use, we recommend using a lock washer and pin
Manganese-phosphated, * length not standardised

All Features

Bit holder size: 1/2 inch
Connection size (machine): 1/4"
Connection type (machine): Internal square
Length: 35 mm
Drive square [metric]: 12.5 mm
Drive hexagon [metric]: 6.3 mm
Drive square [inch]: 1/2"
Drive hex [inch]: 1/4"
Standard: DIN 3121 - G 6,3DIN 7427 - form A DIN ISO 1173
Surface area: corpus manganese-phosphated
Overall length [mm]: 35 mm

Brand GEDORE
41892693
EAN 4010886652411
Supplier number GEDORE 6524150

Frequently asked questions about this product

Answered by specialists

What is this bit holder used for?: The Gedore KB 619 allows you to use 1/4" hex screwdriver bits on power tools or ratchets with a 1/2" female square drive.
What connection does the drive end have?: The drive side has a 1/2" internal square drive according to DIN 3121 Form G.
Which bits are compatible with this adapter?: It fits standard 1/4" hex screwdriver bits conforming to DIN ISO 1173 and DIN 3126 - D 6.3.
What is the total length of this holder?: The total length of this bit holder is 35 mm.
Is this bit holder suitable for machine use?: Yes, it is designed for both hand and power tools. For power tool use, securing with a pin and retaining ring is recommended.