Socket screwdriver bit Unior 1/4" 3 mm 607898 for hand and power screwdrivers

Unior 1/4" 3 mm socket screwdriver bit is a compact bit designed for use with standard 1/4" bit holders, hand drivers and compatible power screwdrivers. The bit provides a precise 3 mm tip intended for fastening small screws and components in electronics, mechanical assemblies and routine maintenance tasks. Constructed to meet typical workshop tolerances, it offers a consistent fit with 3 mm fasteners and straightforward compatibility with common 1/4" drive tool systems.

Advantages

The bit delivers accurate tip geometry for reliable engagement with 3 mm screw heads, reducing cam-out and minimizing damage to fasteners. Its 1/4" shank ensures solid retention in bit holders and quick-change chucks used in both manual and powered drivers. The compact size and standardized drive facilitate easy storage and interchangeability with other 1/4" accessories.

Suitable for

• Electronics assembly and repair where small 3 mm fasteners are used
• Mechanical and precision assemblies requiring a 3 mm tip
• General maintenance and service tasks with 1/4" bit holders or power drivers
• Workshops and tool kits that use standardized 1/4" drive accessories

Key specifications

• Drive size: 1/4" (6.35 mm) shank compatible with standard bit holders
• Tip size: 3 mm, designed for small screw heads and precision fasteners
• Intended use: manual hand drivers and compatible power screwdrivers
• Form factor: single compact socket screwdriver bit for easy storage

How to use

Insert the 1/4" shank of the bit into a compatible bit holder, hand driver or power screwdriver chuck until it seats securely. Select appropriate torque and speed settings on the power tool if used, and engage the fastener with steady pressure to avoid slipping. For manual use, hold the driver firmly and apply controlled force. After use, clean debris from the tip and store the bit in a holder or toolbox to protect the tip geometry.

Usage recommendations

Use correct torque settings when operating with power drivers to prevent over-tightening small screws. Inspect the tip periodically for wear and replace the bit if it shows rounding or deformation to maintain precise engagement with fasteners.