Wiha 36990 Long Arm Ball End Hex Key Set 9 Piece

Product Description

The WIHA 36990 is a 9-piece metric L-key set featuring long arm ball end hex keys in sizes ranging from 1.5 to 10mm. Constructed from chrome vanadium molybdenum steel, these keys deliver the strength and durability required for repeated use in production, maintenance, and field service environments. The long arm design provides extended reach into recessed fasteners, while the ball end allows driving at angles up to 30 degrees off-axis — useful when straight access is not available. The set is suitable for HVAC equipment assembly, motor and pump service, electrical panel work, and general mechanical maintenance tasks.

This hex key set is intended for trade professionals and skilled technicians who regularly work with metric socket head cap screws and set screws. Common applications include servicing variable speed drives, motor mounts, equipment enclosures, and control panel hardware. The 9 included sizes — 1.5, 2, 3, 4, 5, 6, 7, 8, 9, and 10mm — cover the majority of metric fastener sizes encountered in commercial and residential mechanical systems. Each key features the long arm configuration for added torque leverage on the short arm side.

Key Features

• Ball end tip allows angled driving up to 30 degrees off-axis for tight clearance situations
• Long arm design increases reach into deep or recessed fastener locations
• Chrome vanadium molybdenum steel construction for high torque capacity and durability
• 9-piece metric set covers sizes 1.5, 2, 3, 4, 5, 6, 7, 8, 9, and 10mm
• Short arm side available for increased torque when needed

Compatibility

Designed for use with metric socket head cap screws and set screws across a wide range of mechanical, HVAC, plumbing, and electrical service applications.

Installation Notes

Use the long arm end for reach and the short arm end when higher torque is needed to avoid fastener rounding. Do not use hex keys on fasteners that are corroded or damaged beyond their drive capacity, as ball end tips are more susceptible to rounding under extreme torque. Always select the correct key size before applying force to avoid fastener damage.