Wera 05027105001 Long Arm Hex Key 4 Mm

Product Description

The WERA 05027105001 is a metric long-arm hex key designed for fastening and loosening hex socket fasteners in professional trade applications. Built in an L-handle configuration, it features a 4 mm hex end and a 140 mm overall length. The extended long arm provides increased reach into recessed fastener locations, while the shorter arm delivers additional torque leverage when driving stubborn fasteners. This tool is a standard item for HVAC technicians, plumbers, electricians, and mechanical contractors who regularly work with hex socket cap screws, set screws, and similar metric fasteners.

The 05027105001 is well suited to both bench work and field service scenarios where metric hex fasteners are common. The L-handle geometry allows the technician to switch between high-torque driving on the short arm and extended reach on the long arm without swapping tools. It is appropriate for residential and light commercial mechanical work, equipment assembly, and component replacement tasks requiring a 4 mm metric hex drive.

Key Features

• 4 mm metric hex end fits standard hex socket fasteners
• Long-arm design provides extended reach into recessed fastener positions
• L-handle configuration enables both torque leverage and deep-access driving
• 140 mm overall length suits a wide range of service and assembly applications
• Lightweight at 0.09 pounds for reduced hand fatigue during repetitive use

Compatibility

Designed for use with 4 mm metric hex socket fasteners including cap screws, set screws, and grub screws commonly found in HVAC equipment, plumbing assemblies, and electrical enclosures.

Installation Notes

This tool is used by licensed mechanical, HVAC, and electrical technicians as part of standard hand-tool inventory. Ensure the hex key is fully seated in the fastener socket before applying torque to prevent rounding of the fastener drive. Inspect the hex key tip for wear or deformation before use on critical fasteners. No power source or special code compliance is required for use of this hand tool.