Nut Driver Bit Wera 8789

The Wera 8789 nut driver bit is a 1/4" hexagonal tool bit with a length of 110 mm designed to drive and remove hex nuts and bolts. Manufactured by Wera, this bit is built for durability and precision, offering a secure fit and efficient torque transfer for both professional and DIY applications. Its slender profile and extended length make it suitable for reaching recessed fasteners while maintaining control and alignment during operation.

Advantages

The Wera 8789 nut driver bit provides accurate engagement with hexagonal fasteners to minimize rounding and slipping. Its 110 mm length improves access in tight or deep locations without sacrificing stiffness. Constructed from hardened tool steel and finished for corrosion resistance, the bit is optimized for repeated use and consistent torque delivery. The uniform shank dimensions ensure compatibility with common bit holders and quick-change systems.

Suitable for

• Driving and removing 1/4" hex nuts and screws in mechanical assemblies
• Accessing recessed or hard-to-reach fasteners in machinery and appliances
• Maintenance and repair tasks in automotive and industrial environments
• DIY projects requiring precise torque transfer and reliable bit engagement

Key specifications

• Hex size: 1/4"
• Overall length: 110 mm
• Material: hardened tool steel
• Finish: corrosion-resistant surface treatment
• Shank type: standard bit shank for use with bit holders and quick-change chucks

How to use

Select a compatible driver or bit holder and insert the Wera 8789 nut driver bit into the chuck or magnetic holder until it seats securely. Position the bit onto the hexagonal fastener, ensuring full engagement before applying torque. Apply steady, controlled force when driving or loosening fasteners to prevent cam-out and to protect the fastener head. After use, clean debris from the bit and store it in a protective bit holder to prevent damage.

Usage recommendations

For best results, match the 1/4" hex size precisely to the fastener and avoid using the bit with impact drivers unless the bit and driver are specified as compatible; excessive impact force can shorten tool life. Periodically inspect the tip for wear and replace the bit if rounding or damage appears to maintain safe and effective operation.