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Black oxide 4 mm hex key, 150 mm long, L-shaped

Wiha Tools

Wiha Tools 33441 4 mm Hex Key 150 mm

SKU CH-Y7A0-4YVA4 MPN 33441

A 4 mm hex key with 150 mm arms, black oxide finish and corrosion-resistant construction

  • Product typeHex/Torx Keys
  • Main materialHAWA
  • Color and finishBlack Oxide
  • 4 mm metric hex tip fits standard fasteners
  • 150 mm arm length gives extra leverage and reach
  • Black oxide finish resists corrosion during use
  • Insulated shaft protects against electrical shock
  • Non-magnetic steel avoids interference with sensitive components

4 mm Hex Key 150 mm

The Wiha Tools 33441 is a metric hex key with a 4 mm tip and a 150 mm arm length. It is made from HAWA material with a black oxide finish. The tool is insulated and corrosion resistant for durability. It suits technicians and DIY users who need a single reliable hex driver.

Suited for 4 mm fasteners only

This key fits 4 mm hex sockets and is not suitable for other metric or imperial sizes. Buyers who need multiple tip sizes or a complete hex key set should look at a different product. The non-magnetic design will not hold screws in place during installation. It is also not tether ready for working at height.

Handles standard 4 mm applications

The 150 mm length provides good reach and leverage for common assembly and maintenance tasks. Insulation allows use on live low-voltage circuits where appropriate. The key runs out of torque on very tight or seized large fasteners where a longer bar or impact driver would be required. Corrosion resistance extends service life in damp environments.

How it compares

Measured against everything we stock in Pliers, Wrenches & Gripping Tools, at today’s prices. Recalculated every night.

Price $7.99
Cheaper than about 87% of the 2,110 comparable items (median $23.99).

Specifications

Product
Brand nameWiha Tools
Model name33441
Product typeHex/Torx Keys
Color and finishBlack Oxide
Size & build
Main materialHAWA

Questions about this item

What size hex fasteners does the 4 mm tip on the Wiha 33441 fit?

The 4 mm hex tip fits metric fasteners that require a 4 mm key, such as M5 socket-head cap screws and M5 set screws.

Will the 150 mm arm length reach recessed bolts on older equipment?

At 150 mm the long arm provides extra reach for deep or recessed fasteners found on legacy machinery.

How can I confirm the black-oxide finish is intact after first use?

Inspect the key for a uniform dark surface without bare-metal scratches; the corrosion-resistant coating should remain even after initial torque.

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