What socket sizes does this swivel head wrench have?

This wrench combines two sizes: 18 mm on one end and 19 mm on the other.

How far do the heads pivot?

Both heads swivel 180°, allowing easy access to fasteners in tight spaces and awkward angles.

What is the overall length of the wrench?

The total length of the Bahco 4040M-18-19 is 303 mm.

What material is this wrench made from?

It is manufactured from high-performance alloy steel with a chrome-plated micro-matte finish.

BAHCO 4040M-18-19 knee spanner with Dynamic-Drive profile, chrome-plated, length 303 mm, 18 mm x 19 mm

Name: BAHCO 4040M-18-19 knee spanner with Dynamic-Drive profile, chrome-plated, length 303 mm, 18 mm x 19 mm
Brand: BAHCO
SKU: 41850592
Price: 38.4 EUR
Availability: PreOrder

Supplier number: BAHCO 4040M-18-19 | EAN 7314151078324

Recommended Retail Price €72.71

38.40 tax incl.

€31.73 excl. VAT (incl. all environmental contributions)

On order: delivered from 21/10/2026

Ordered before 20:00 - delivered as of 21/10/2026
Shipping costs €11.99 VAT included | Free shipping for orders over a total amount of 125 euros
Delivery by DHL
Lifetime warranty on Bahco? Or limited in time? Read more about it here.
Delivered from Belgium

✆ Talk to a specialist

Flexible access for tight spaces

Practical benefits

Swivelling 180° dual heads: You reach deeply recessed bolts with ease thanks to flexible articulated sockets at both ends.
Protects fasteners from wear: The Dynamic-Drive profile on this Bahco wrench reduces rounding of nuts while maximizing contact.
Two versatile metric sizes: You work smoothly with 18 mm and 19 mm ends combined in one durable tool.

In a nutshell

The right choise for

With the Bahco 4040m-18-19 swivel head wrench, you reach deeply recessed fasteners and awkward angles with ease. Both socket heads swivel 180°, allowing you to navigate tight engine bays or compact industrial machinery without extra extensions. The 12-point Dynamic-Drive profile grips fasteners on the flats rather than the corners, reliably preventing damage and premature rounding. Combining versatile 18 mm and 19 mm socket sizes into a single 303 mm high-performance alloy steel tool, this wrench ensures you work faster, more accurately, and with complete control.

Product information FAQ

€38.40

tax incl.

Key features according to our expert

Width across flats 1: 18 mm
Width across flats 2: 19 mm
Key type: Socket wrench
Length: 303 mm

Product description:

Double ended flex-head wrenches with double hexagon sockets in metric sizes
Material: High performance alloy steel
Chrome plated Micro Matt finishing provides high quality surface
12 points Dynamic-Drive Profile provides longer life for screws and nuts
Both heads 180º swivelling. New design of the sockets for better accessibility
Retail packed on a plastic card

All Features

Width across flats 1: 18 mm
Width across flats 2: 19 mm
Key type: Socket wrench
Length: 303 mm
Width head 2 mm (d2): 25,3 mm
Width head 1 mm (d1): 24,2 mm
Length mm (l): 303 mm
Weight g: 393 g
Size mm: 18x19 mm

Brand BAHCO
41850592
EAN 7314151078324
Supplier number BAHCO 4040M-18-19
Warranty Lifetime warranty on Bahco? Or limited in time? Read more about it here.

Frequently asked questions about this product

Answered by specialists

What socket sizes does this swivel head wrench have?: This wrench combines two sizes: 18 mm on one end and 19 mm on the other.
How far do the heads pivot?: Both heads swivel 180°, allowing easy access to fasteners in tight spaces and awkward angles.
What is the benefit of the Dynamic-Drive profile?: The 12-point Dynamic-Drive profile grips fasteners on the flats rather than the corners, reducing wear and damage.
What is the overall length of the wrench?: The total length of the Bahco 4040M-18-19 is 303 mm.
What material is this wrench made from?: It is manufactured from high-performance alloy steel with a chrome-plated micro-matte finish.