Wera 05027104001 Hex Key 3 Mm Long Arm

Product Description

The WERA 05027104001 is a metric L-handle hex key designed for driving hexagonal socket fasteners in tight or deep-access applications. Built on a long-arm geometry with an overall length of 126 mm (approximately 4.96 inches), it delivers increased torque leverage compared to standard-arm versions while still allowing access in confined spaces. The 3 mm hex drive is sized for small-to-medium fasteners common in mechanical assemblies, HVAC equipment panels, and electrical enclosures. This is a hand tool intended for professional tradespeople who need precise, controlled torquing without power tools.

The long-arm L-handle configuration suits a wide range of field and bench service tasks. It is well suited for residential and light commercial HVAC service, electrical panel work, plumbing fixture assembly, and pool equipment maintenance where 3 mm hex fasteners are used. The extended arm allows faster rotation when running fasteners down from a distance, while the short arm provides the increased torque needed for seating. Tradespeople who carry a full hex key set will find this size useful for equipment covers, access panels, and component brackets.

Key Features

• 3 mm hex drive sized for small metric fasteners common in trade equipment
• Long-arm geometry provides increased reach and faster rotation during installation
• L-handle design allows switching between high-speed and high-torque operation
• Overall length of 126 mm (approximately 4.96 inches) for balanced control
• Metric system sizing for compatibility with metric-specification equipment

Compatibility

Designed for use with 3 mm hexagonal socket fasteners in metric-specification assemblies across HVAC, electrical, plumbing, and pool service applications.

Installation Notes

No power source or lockout is required for hand tool use, but always de-energize equipment before removing fasteners from electrical enclosures or control panels. Ensure the hex key is fully seated in the fastener socket before applying torque to avoid cam-out or fastener damage. This tool is intended for manual use only and should not be adapted for use with power drivers.