Hex key set Bondhus BO74999 — 9-piece long hex keys 1.5–10 mm with ball ends and locking sleeves

Bondhus BO74999 is a 9-piece long hex key set comprising L-shaped keys in metric sizes from 1.5 mm to 10 mm. Each key has a ball end for easier access to fasteners at an angle and a locking sleeve that secures the key in compatible holders or pockets. The long arm length provides extended reach and improved leverage for assembly, maintenance and repair tasks on machinery, bicycles, electronics and furniture where confined access and torque control are important.

Advantages

The set combines long hex keys with ball-end geometry to allow up to approximately 25–30° of angled engagement, reducing the need for disassembly when fasteners are hard to reach. A locking sleeve on each key keeps tools organized and compatible with standard holders, preventing accidental loss during work. The L-shaped form offers both reach and mechanical advantage: the long arm reaches into recessed fasteners while the short arm provides high torque when required. Durable material and precise key tolerance ensure consistent fit and minimize rounding of fastener heads.

Suitable for

• Assembly and adjustment of bicycles and e-bikes
• Maintenance and repair of machinery and industrial equipment
• Electronics assembly and service where compact tools are needed
• Furniture assembly and adjustment in tight spaces
• General workshop and home repair tasks requiring extended reach

Key specifications

• Set composition: 9 long L-shaped hex keys
• Metric sizes: 1.5 mm, 2 mm, 2.5 mm, 3 mm, 4 mm, 5 mm, 6 mm, 8 mm, 10 mm
• Ball end on long arm for angled engagement
• Locking sleeve on each key for secure storage and holder compatibility
• Long-arm design for extended reach and increased leverage
• Precision-machined tips for accurate fit and reduced fastener wear

How to use

Select the hex key that matches the fastener size and insert the short or long arm into the screw head depending on required torque and clearance. Use the long arm for reach or when needing to maintain distance from the workpiece, and use the short arm for higher torque applications. For angled access, engage the ball end with the fastener head and operate within the recommended angle range to avoid tip slippage. When not in use, slide the locking sleeve to secure the key in compatible holders or storage systems to prevent misplacement.

Usage recommendations

Use the correct size to avoid rounding the fastener. Apply steady, controlled force rather than abrupt torque peaks. Inspect keys regularly for tip wear and replace the set if fit becomes loose; keep the locking sleeves engaged during transport and storage to maintain organization.