Hex key Proline 2 mm — model 48442, single-piece metric Allen key

Proline 2 mm hex key model 48442 is a single-piece metric Allen key designed for driving hexagonal socket screws and fasteners with a 2 mm tip. Made from quenched and tempered steel and finished with polished chromium, this compact hand tool provides a precise fit for small hex fasteners commonly found in electronics, bicycles, appliances and furniture. Its single-piece design ensures consistent alignment and torque transmission when accessing tight or recessed fasteners.

Advantages

The hardened and tempered construction improves durability and resistance to bending during regular use. A polished chromium finish reduces surface corrosion and allows the tool to slide smoothly in confined spaces. The single-piece shape offers stable handling and a reliable contact profile on 2 mm hex sockets, minimising rounding of screw heads when used correctly.

Suitable for

• Electronics assembly and maintenance
• Bicycle adjustments and brake/derailleur tuning
• Small household repairs and furniture assembly
• Model building and precision mechanical work

Key specifications

• Tip size: 2 mm hex (metric)
• Design: single-piece Allen key
• Material treatment: quenched and tempered steel
• Finish: polished chromium
• Application: manual hand tool for hex socket screws

How to use

Insert the 2 mm tip fully into the hex socket of the fastener to ensure maximum contact. Apply steady, even torque while maintaining alignment between the key and the screw head to avoid slippage or rounding. For stubborn fasteners, use controlled incremental force rather than sudden high torque. After use, wipe the tool clean and store it in a dry place to preserve the polished finish.

Usage recommendations

Use the 2 mm hex key only with matching hex socket fasteners and avoid excessive torque beyond the fastener's capacity. Regularly inspect the tip for wear and replace if the profile becomes rounded to prevent damage to screw heads. Store the tool away from moisture to maintain the chromium finish and prevent corrosion.