Extension Bit 1/4" 100 mm Proxxon – 1/4-inch 100mm screwdriver/socket extension

Proxxon 1/4" 100 mm extension is a compact tool accessory designed to extend the reach of 1/4-inch screwdriver bits and sockets. The 100 mm length allows access to recessed or hard-to-reach fasteners while maintaining effective torque transfer. Made for use with hand drivers and compatible power drivers, this extension is intended to improve accessibility in precision repair, electronics work, automotive interior tasks and general assembly where extra reach is required.

Advantages

The extension provides a reliable connection between driver and bit or socket, preserving torque transmission across its length. Its 100 mm size balances added reach with controllability, reducing the need to disassemble surrounding parts to reach fasteners. Constructed to fit standard 1/4-inch bit holders, it is compatible with many common screwdriver and socket systems. The slim profile facilitates access into narrow openings while keeping a secure fit to prevent wobble during use.

Suitable for

• Precision electronics repairs and small appliance servicing
• Automotive interior and dashboard fastener access
• Furniture assembly and tightening in recessed screw positions
• General mechanical and assembly tasks requiring extended reach

Key specifications

• Drive size: 1/4-inch (6.35 mm) compatible
• Length: 100 mm overall extension
• Material: hardened steel construction for torque transfer
• Connection type: male/female 1/4" interface for standard bits and sockets
• Profile: slim cylindrical shaft for narrow access

How to use

Select a compatible 1/4-inch bit or socket and insert it securely into the extension's socket end until it clicks or seats. Attach the extension's drive end to a hand driver, bit holder, or compatible power driver. Reach the fastener through the extension, keep the shaft aligned with the fastener axis to minimize bending, and apply torque steadily. After finishing, remove the extension by pulling the bit or detaching from the driver as appropriate.

Usage recommendations

Use the extension within the torque limits recommended for 1/4-inch bits to avoid deformation. Keep the shaft straight under load and avoid excessive side forces. Inspect the connection points for wear before use and remove burrs or debris to ensure a secure fit. For tasks requiring higher torque, use a shorter adapter or a properly sized socket and driver.