Hex Key Set Bondhus BO12199 long 9 pcs 1.5–10 mm

Bondhus BO12199 long 9 pcs 1.5–10 mm is a set of nine L-shaped long-arm hex keys covering metric sizes from 1.5 mm to 10 mm. The long-arm design increases reach and torque, making it easier to access recessed or deep-set hex fasteners. The set is suitable for general maintenance, assembly and adjustment tasks where metric hex keys are required.

Advantages

The long-arm configuration provides improved reach and leverage compared with standard short keys, while the L-shaped profile offers both a short and long working end for versatile access. Solid construction ensures consistent engagement with hex sockets, reducing cam-out and fastener wear. A compact set of nine sizes covers common metric applications without taking much space in a toolbox or workshop.

Suitable for

• Electronics assembly and repair
• Bicycle maintenance and component adjustment
• Furniture assembly and tightening of recessed bolts
• General workshop and mechanical maintenance

Key specifications

• Number of pieces: 9
• Metric sizes included: 1.5 mm, 2 mm, 2.5 mm, 3 mm, 4 mm, 5 mm, 6 mm, 8 mm, 10 mm
• Type: L-shaped long-arm hex keys (Allen keys)
• Material and finish: durable steel construction with protective finish for wear resistance
• Design feature: long arm for extended reach and greater leverage

How to use

Select the hex key that matches the fastener size to ensure a snug fit. Insert the short or long end into the hex socket depending on required reach and leverage; use the long end for deep or recessed fasteners and the short end when greater torque is needed. Apply steady, even force to avoid rounding the fastener. After use, clean any debris from the tool and store the set in a toolbox or holder to keep sizes organized.

Usage recommendations

Use the correct size to prevent fastener damage and avoid excessive bending or prying on the long arm. For high-torque applications, use the short end as the lever and ensure the key is fully seated in the fastener. Store in a dry place to reduce corrosion and maintain tool performance.