Hex Key Bondhus BO13950 1.5 mm, length 77 mm — ball-end Allen key

Bondhus BO13950 is a 1.5 mm hex key with a 77 mm overall length and a ball-end tip that allows access to hex fasteners at slight angles. The tool is designed for tasks requiring reach and maneuverability in confined or recessed areas, making it suitable for electronics assembly, bicycle adjustments, small machinery maintenance, and field repairs. Its compact size enables storage in tool rolls, small kits, or pockets while providing enough leverage for precise tightening and loosening of small fasteners.

Advantages

The ball-end geometry permits up to a 25–30° working angle from the fastener axis, increasing accessibility in tight or awkward spaces without stripping the head when used correctly. The 1.5 mm tip provides accurate engagement with small hex sockets, while the 77 mm length gives additional reach compared with standard short keys. Constructed to industrial tolerances, the key maintains consistent fit and torque transfer for repeatable results in assembly and repair tasks.

Suitable for

• Assembly and repair of electronic devices and consumer electronics
• Bicycle component adjustments and maintenance
• Small machinery and equipment maintenance
• On-site service and field repairs where compact tools are required
• Hobbyist and precision work requiring small hex fasteners

Key specifications

• Hex size: 1.5 mm
• Overall length: 77 mm
• Tip style: ball-end for angled entry
• Material and finish: tool-grade steel with corrosion-resistant treatment (manufacturer standard)
• Intended use: manual hex fastener tightening and loosening

How to use

Insert the 1.5 mm tip into the hex socket of the fastener, ensuring full seating for optimal torque transfer. For straight engagement use the long axis of the key; to reach fasteners at an angle, use the ball-end feature while keeping the load within recommended limits to avoid cam-out. Apply steady, controlled force to turn the fastener; reverse direction to loosen. After use, wipe clean and store in a dry place to preserve tool condition.

Usage recommendations

Use the ball-end only when necessary to access angled fasteners; for maximum torque and reduced risk of rounding, engage the hex with the straight entry when possible. Match the 1.5 mm key precisely to the fastener size and avoid excessive force that could damage small heads or the tool.