Wiha 334/4.0-100 L-Key Hex Key 4.0 mm, Chrome-Plated, DIN 911

Through-hardened chrome-vanadium steel with a bright chrome-plated finish gives this 4.0 mm L-key exceptional torque strength and corrosion resistance. The 100 mm long arm reaches deep-set socket screws, while the 28 mm short arm delivers high leverage in tight spaces.

Overview

The Wiha 334/4.0-100 is a metric hex key (L-key) for hexagon socket screws. Its hexagonal shaft is precision-machined to DIN 911, ensuring a secure fit and long service life. The L-shape provides two working ends: a long arm for reach and a short arm for high torque.

What stands out

• Through-hardened chrome-vanadium steel for maximum strength
• Bright chrome-plated surface for corrosion protection
• Precision tip size 4.0 mm, metric
• Long arm length 100 mm, short arm 28 mm
• Conforms to DIN 911

Technical details

• Tip size: 4.0 mm
• Measurement system: Metric
• Blade material: Chrome-vanadium steel
• Hardness: Through-hardened
• Surface finish: Bright chrome-plated
• Standard compliance: DIN 911
• Long arm length (L1): 100 mm
• Short arm length (L2): 28 mm
• Shaft shape: Hexagonal
• Handle type: L-shape
• Corrosion protection: Yes (chrome-plated)
• Application: For hexagon socket screws
• Series: 334
• Magnetic tip: No

Our verdict

A professional-grade L-key that combines precise fit, high strength, and corrosion resistance. Ideal for maintenance, assembly, and repair tasks where reliable hex key performance is essential.