Hex Key Set (Imperial) Bondhus BO10937 – long ball-end L-keys 0.050–3/8 in, 13 pieces

Bondhus BO10937 is a 13-piece imperial hex key set comprising long L-shaped keys with ball-end tips. The set covers sizes from 0.050 inch up to 3/8 inch, offering a continuous range of imperial sizes for assembly, maintenance and precision mechanical tasks. Long shafts increase reach and leverage while the ball-end geometry permits angled engagement with fasteners in confined or hard-to-reach locations.

Advantages

The long ball-end L-keys combine extended reach with the ability to work at an angle, reducing the need to reposition parts or disassemble surrounding components. Hardened tool steel construction and precise hex profiles ensure consistent fit and reduced rounding of fastener heads. The L-shape provides two working lengths for torque and access, while the ball-end allows up to approximately 25–30° of entry angle for off-axis engagement.

Suitable for

• Assembly of furniture, fixtures and industrial equipment using imperial fasteners
• Maintenance and repair tasks where bolts are recessed or in tight spaces
• Precision mechanical work on instruments, machinery or electronics that use imperial hex sockets
• Automotive and bicycle repair requiring extended reach and angled entry

Key specifications

• Number of pieces: 13
• Size range: 0.050 in to 3/8 in (imperial sizes)
• Key type: long L-shaped hex keys
• Tip style: ball-end on long leg for angled entry
• Material: hardened tool steel with precision-machined hex profile
• Finish: corrosion-resistant surface treatment

How to use

Select the key size that matches the hex socket of the fastener to ensure a snug fit. Use the long leg for reach and lower torque requirements, or the short leg for increased leverage when higher torque is needed. For access at an angle, insert the ball-end and engage the socket with care, keeping the tool aligned to avoid cam-out. Apply steady force and avoid excessive bending of the long shaft to maintain tool life and prevent damage to fastener heads.

Usage recommendations

Store the keys in their holder or roll to protect tips and maintain organization. For repetitive torque-critical applications, verify fit before use and replace worn keys to prevent rounded sockets. When working in confined spaces, use the ball-end feature to engage fasteners at an angle, but switch to the straight hex portion when maximum torque is required.