Bit for Hexagon Socket Screws Wera 05056684001 4 mm × 25 mm

Replacement bit for hexagon socket screws by Wera, size 4 mm with a working length of 25 mm. This precision-machined bit is intended for driving and removing internal hex (hexagon) socket fasteners when used with compatible bit holders, ratchets, or screwdrivers. The compact 25 mm working length offers access in moderate recesses while maintaining stable torque transfer between driver and fastener.

Advantages

The bit is manufactured to tight dimensional tolerances for a secure fit in hex socket heads, reducing cam-out and wear. Heat-treated steel construction ensures durability under repeated use and reliable torque transmission. Its standardized 4 mm profile matches common internal hex fasteners, and the 25 mm length balances reach and control for general assembly and maintenance tasks.

Suitable for

• Assembly of machinery and equipment requiring internal hex screws
• Maintenance and repair of electronics, appliances and furniture
• Automotive trim and component fastening where 4 mm hex sockets are used
• Workshop toolsets and modular bit holders for general fastening tasks

Key specifications

• Bit type: internal hex (hexagon socket) bit
• Size: 4 mm (hexagon width)
• Working length: 25 mm
• Material: heat-treated steel for wear resistance
• Drive connection: standard bit shank compatible with common bit holders and screwdrivers

How to use

Select a compatible bit holder or screwdriver that accepts the bit shank and insert the bit securely. Align the 4 mm hexagon tip with the internal hex socket of the fastener, apply steady axial pressure and turn the driver to drive or remove the screw. Use appropriate torque and avoid over-tightening to prevent damage to the screw head or bit. Inspect the bit tip before use and replace it if rounded or worn to maintain proper fit.

Usage recommendations

Use the bit with matched 4 mm hex socket fasteners and suitable torque-limiting tools when precise tightening is required. Store the bit in a clean, dry toolbox or bit organizer to prevent corrosion and preserve tip geometry. For high-torque or impact applications, confirm that both bit and holder are rated for such use to avoid premature wear or failure.