Are these screwdriver bits suitable for impact drivers?

Yes, the torsion zone absorbs high torque peaks, making these bits ideal for use with impact drivers.

What drive type and size do these bits feature?

These bits have a Torx T40 profile, designed for matching T40 screws.

What shank connection do these bits have?

They feature a standard 1/4" hex shank, compatible with 1/4" bit holders and chucks.

What is the overall length of these bits?

Each bit in this pack has a length of 50 mm.

How many bits are included in this pack?

This pack contains 5 Dewalt DT7399T-QZ screwdriver bits.

DEWALT DT7399T-QZ IMPACT screw bit Torsion 50mm Torx T40 (5 pcs)

Name: DEWALT DT7399T-QZ IMPACT screw bit Torsion 50mm Torx T40 (5 pcs)
Brand: DEWALT
SKU: 02506065
Price: 11.5 EUR
Availability: InStock

Supplier number: DEWALT DT7399T-QZ | EAN 5035048089422

11.50 tax incl.

€9.50 excl. VAT (incl. all environmental contributions)

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

blister

Ordered before 20:00 - delivered as of 05/10/2026
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

What does this mean exactly?

Free battery, delivered directly: spend a total of €350 excl. VAT on DeWALT products and receive a free XR 18V 5.0Ah battery worth €128.38. This is an exclusive Klium promotion: the battery is automatically added to your shopping cart and delivered together with your order.
Free work light, delivered after registration: if you also purchase a participating product from the DeWALT work light promotion, you will receive a free DeWALT work light, depending on the participating machine.
To receive your free work light, register your purchase after receiving your order via dewalt.be or dewalt.nl.
Klium free battery promotion: valid from 01.10.2026 to 31.12.2026.
DeWALT work light promotion: valid from 01.09.2026 to 31.12.2026.

During DeWALT Power Month, you can combine a free battery from Klium with a free work light from DeWALT.

Heavy-duty fastening with Dewalt

Practical benefits

Torsion zone absorbs impacts: The engineered torsion zone flexes under sudden torque spikes, protecting your bit tip from premature breakage during tough fastening.
Secure fit reduces cam-out: The CNC-machined Torx T40 profile delivers a snug fit, ensuring you drive screws smoothly without wobble or slippage.
Built for impact drivers: Featuring a standard 1/4" hex shank, you can pair these bits directly with heavy-duty impact drivers and drill drivers.

In a nutshell

The right choise for

Tackle heavy-duty fastening tasks with confidence using the Dewalt DT7399T-QZ screwdriver bit set. Designed for impact drivers with a standard 1/4" hex shank, these 50 mm bits feature an engineered torsion zone that absorbs severe torque peaks, preventing premature tip breakage during tough timber and metal applications. The precisely machined Torx T40 profile provides a snug fit in the screw head to eliminate slipping, cam-out, and wobble. Supplied in a practical pack of 5 pieces, these durable bits deliver the performance and extended lifespan needed on demanding jobsites.

Product information FAQ

€11.50

In stock - tax incl.

Key features according to our expert

Length: 50 mm
Blade thickness: Not applicable
Type of drive profile (bit): Torx
Connection size (bit): 1/4"
Bit profile: T40
Number per blister: 5
Drive profile size (bit): 40

Product description

IMPACT Torsion 50mm Torx T40

Features

Longer bit life
Removes possibility on rounded screw heads and wobble effects.
Greater than 4°.

All Features

Length: 50 mm
Blade thickness: Not applicable
Type of drive profile (bit): Torx
Connection size (bit): 1/4"
Bit profile: T40
Number per blister: 5
Drive profile size (bit): 40
Pack quantity: 5,0
Max. cutting capacity at 45° [square profile]: 57,0 mm
Head type: Torx
Thickness: T40
Material: Extreme

Brand DEWALT
02506065
EAN 5035048089422
Supplier number DEWALT DT7399T-QZ

Frequently asked questions about this product

Answered by specialists

Are these screwdriver bits suitable for impact drivers?: Yes, the torsion zone absorbs high torque peaks, making these bits ideal for use with impact drivers.
What drive type and size do these bits feature?: These bits have a Torx T40 profile, designed for matching T40 screws.
What shank connection do these bits have?: They feature a standard 1/4" hex shank, compatible with 1/4" bit holders and chucks.
What is the overall length of these bits?: Each bit in this pack has a length of 50 mm.
How many bits are included in this pack?: This pack contains 5 Dewalt DT7399T-QZ screwdriver bits.