Hex Bit Wera 842/1 3 mm Tool Steel Alloy Tough D 6.3

Wera 842/1 hex bit with a 3 mm hex tip is made from tool steel Alloy Tough and designed for use with 6.3 mm (1/4") bit holders and drivers. The compact bit delivers precise engagement with hex fasteners, offering consistent torque transmission and improved wear resistance for assembly, maintenance and repair tasks in workshops and on-site environments.

Advantages

The bit's tool steel Alloy Tough construction provides enhanced hardness and resistance to deformation under repeated load. Its 3 mm hex profile ensures accurate fit in corresponding fasteners, reducing cam-out and rounding. The 6.3 mm (1/4") shank diameter makes the bit compatible with standard bit holders, quick-change systems and many powered drivers, allowing quick replacement and straightforward handling. The compact length supports work in confined spaces while maintaining reliable torque transfer.

Suitable for

• Assembly of furniture and mechanical components with 3 mm hex fasteners
• Maintenance and repair tasks in workshops and service vans
• Use with 6.3 mm (1/4") bit holders, ratchets and powered drivers
• Confined-space fastening where a short, precise bit is required

Key specifications

• Tip profile: 3 mm hex (Allen)
• Material: tool steel Alloy Tough
• Shank diameter: 6.3 mm (1/4")
• Suitable for bit holders and drivers with 6.3 mm (1/4") interface
• Compact length for use in restricted spaces

How to use

Insert the 6.3 mm (1/4") shank into a compatible bit holder, ratchet or driver until it locks. Engage the 3 mm hex tip with the mating fastener head, apply steady axial pressure and turn the driver to tighten or loosen the fastener. For powered drivers, use controlled speed and torque settings to avoid over-torquing. Regularly inspect the bit tip for wear and replace if rounding or deformation appears to maintain precise engagement.

Usage recommendations

Use the bit with drivers and holders rated for the intended torque range; avoid excessive force that may damage the bit or fastener. Store in a dry place to prevent corrosion and keep the tip clean for optimal fit. Replace the bit when signs of wear compromise fit or torque transfer.