Hex key Proline 7 mm, model 48447, single-piece hex wrench

Proline 7 mm single-piece hex key, model 48447, is a metric hex wrench intended for tightening and loosening hexagonal socket fasteners. Quenched and tempered with a polished chromium finish, this compact hand tool is designed for workshop and household use where a single-size, durable hex key is required for assembly, maintenance and repair tasks.

Advantages

The solid one-piece construction provides reliable torque transfer and reduces the risk of bending or breakage under typical working loads. Heat treatment (quenching and tempering) increases strength and wear resistance, while the polished chromium finish improves corrosion protection and simplifies cleaning. Its compact size allows access in confined spaces and easy storage in toolboxes or kits.

Suitable for

• Assembling furniture and fixtures that use 7 mm hex bolts
• Routine maintenance and repair of machines and equipment with 7 mm hex sockets
• Workshop tasks requiring a single, reliable 7 mm hex key
• Home repairs and DIY projects using metric hex fasteners

Key specifications

• Size: 7 mm metric hex key
• Construction: single-piece solid hex wrench
• Material treatment: quenched and tempered for increased hardness
• Surface finish: polished chromium for corrosion resistance
• Form factor: L-shaped hand tool for leverage and access

How to use

Select the 7 mm end and insert it fully into the hex socket of the fastener to ensure full contact. Apply steady pressure while turning the hex key in the required direction; use the short arm for higher torque and the long arm for extended reach or leverage. Avoid sudden excessive force that could damage the fastener or tool. After use, wipe off debris and store in a dry place to maintain the chromium finish.

Usage recommendations

Use the hex key with compatible 7 mm metric fasteners only. For heavily corroded or rounded fasteners, consider appropriate lubricant or a specialty extractor to avoid damaging the tool. Periodically inspect the hex key for wear and deformation; replace if edges become rounded or if the tool shows signs of cracking.