Hex Key Wiha 7013 Z 2.5 cm 25.4 / 4 mm – hex key set with 2.5 cm and 4 mm tips

Wiha 7013 Z 2.5 cm 25.4 / 4 mm is a compact hex key designed for precise work with 4 mm hex fasteners. With a short 2.5 cm arm length, the tool is intended for use in confined spaces where access is limited. The hex key features a precisely machined tip that matches the hex profile of bolts and screws to reduce rounding and ensure reliable torque transfer during tightening and loosening operations.

Advantages

The short arm design delivers access to recessed or closely spaced fasteners while allowing better control and leverage for precise torque application. Machined chamfers on the tip provide an accurate fit into 4 mm hex sockets, minimizing tool slippage and fastener damage. The compact size reduces interference with surrounding components and makes the tool easy to carry in a pocket or toolbox.

Suitable for

Key specifications

How to use

Insert the 4 mm tip fully into the hex socket of the fastener to ensure maximum contact between tool and fastener. Use the short arm as the working lever for controlled torque in tight spaces; for higher torque, hold the long arm if available. Turn clockwise to tighten and counterclockwise to loosen. Inspect the tool tip and the fastener before use to confirm a clean fit and avoid applying excessive force that can damage the fastener head or the tool.

Recommendations

Use the hex key in clean conditions and avoid applying impact or hammering. Keep the tip free of debris and replace the tool if the tip shows visible rounding or damage. For repetitive or high-torque applications, consider using appropriately sized tools with longer leverage or torque-rated drivers.