Hex key with ball end Jonnesway H06SM140 — 4 mm, very long

Jonnesway H06SM140 is a very long 4 mm hex key with a ball end, designed to reach recessed or angled hex fasteners where standard keys cannot. The extended shaft provides added reach for deep-set bolts and screws, while the ball end enables entry at an angle for improved access in confined spaces. Constructed for workshop, automotive and mechanical tasks, this tool combines length and ball-end versatility to access hard-to-reach hex sockets and maintain stable torque transfer.

Advantages

The very long design allows access to deeply recessed fasteners without the need for extensions or adapters. The ball end permits angled engagement with hex sockets, increasing flexibility when working in tight or obstructed locations. Durable material and precise machining ensure consistent fit in 4 mm hex sockets, reducing cam-out and wear. The single-piece construction maintains rigidity along the extended shaft while providing sufficient clearance around surrounding components.

Suitable for

• Automotive repair and maintenance where fasteners are located deep or at an angle
• Mechanical assembly and disassembly of machinery with recessed hex bolts
• Electromechanical and equipment service in confined spaces
• General workshop tasks requiring extra reach and angled access

Key specifications

• Tool type: very long hex key (Allen key) with ball end
• Size: 4 mm hex
• Ball-end geometry: enables angled entry to hex sockets
• Overall length: very long shaft for extended reach
• Construction: single-piece metal shaft for rigidity and torque transfer
• Finish: machined surface for accurate fit and reduced wear

How to use

Insert the 4 mm hex tip into the socket of the fastener, aligning straight for maximum torque or engage the ball end at an angle when direct access is obstructed. Apply steady, controlled force to avoid rounding the fastener head; the long shaft allows you to reach deep-set bolts while keeping a safe distance from surrounding components. When working at an angle, start with light turns to ensure proper seating of the ball end and then increase torque as needed. Use appropriate support or a secondary tool if high torque is required to prevent bending the shaft.

Usage recommendations

Use the tool for moderate to light torque applications appropriate for a 4 mm hex to avoid overloading the long shaft. Keep the hex tip clean and inspect for wear regularly; replace the tool if the tip becomes rounded. Store in a dry environment to prevent corrosion and maintain the machined fit for reliable engagement.