L-shaped hex key Wiha 00913 4 mm — Chromium-vanadium steel

The L-shaped hex key Wiha 00913 4 mm is a hand tool crafted from chromium-vanadium steel to deliver strength and resistance to wear. Its 4 mm hex tip provides precise engagement with hexagonal socket screws used in machinery, furniture assembly and electronic devices. The compact L-shaped design gives a short arm and a long arm for both torque and reach, allowing access to recessed fasteners while maintaining control during tightening and loosening operations.

Advantages

Chromium-vanadium steel construction ensures durability and retains shape under torque. The 4 mm tip matches standard hex screw sizes, providing accurate fit and reduced cam-out. The L-shaped form offers two working lengths: the short arm for higher torque and the long arm for accessing deeper or recessed screws. Smooth surface finishing minimizes wear on screw sockets and facilitates handling during repeated use.

Suitable for

Key specifications

How to use

Select the 4 mm tip and insert it fully into the hex socket to ensure full contact. Use the short arm to apply higher torque for tightening or loosening stubborn fasteners; use the long arm for reach and access to screws recessed or located in narrow spaces. Maintain steady, controlled pressure while turning to avoid rounding the screw head. Inspect the hex tip and the screw for wear before use and replace the key if the tip becomes deformed.

Recommendations

For best results, keep the tool clean and free of oil or debris to preserve grip and prevent slipping. Do not use the hex key as a pry bar or hammer. When higher torque is required, use a tool specifically designed for higher torque applications to avoid damaging the key or the fastener.