Paramount PAR37107 Hex Key 1/8 Inch Long Arm

Product Description

The PARAMOUNT PAR37107 is a long-arm hex key designed for driving hex socket fasteners in confined or hard-to-reach spaces. The 1/8 inch hex end engages fasteners directly, and the extended arm provides greater reach and improved torque leverage compared to standard-length keys. Built from steel, this tool handles the demands of routine maintenance and installation work across mechanical, HVAC, plumbing, and electrical trade applications. The overall length is 3.75 inches, keeping it compact enough for toolbox carry while still offering the reach advantage of a long-arm design. It is a single-piece hand tool requiring no additional accessories.

This hex key suits trade professionals who regularly work with equipment panels, access covers, set screws, and mechanical assemblies secured with 1/8 inch hex fasteners. Common use cases include adjusting motor mounts, securing equipment covers, and tightening set screws on pulleys, collars, and similar hardware found in HVAC equipment, pump assemblies, and electrical enclosures. The long-arm style allows the short end to be used for high-torque applications and the long end for fast rotation in open areas.

Key Features

• 1/8 inch hex drive fits standard hex socket fasteners
• Long-arm style provides extended reach into recessed or confined fastener locations
• 3.75 inch overall length for compact storage and field portability
• Steel construction for durability under repeated use
• Hex end type for direct fastener engagement without adapters

Compatibility

Designed as a standard 1/8 inch long-arm hex key suitable for use with any hex socket fastener of matching drive size across mechanical and trade service applications.

Installation Notes

This tool is used by HVAC technicians, plumbers, electricians, and mechanical service professionals for fastener driving tasks. Always ensure the hex key is fully seated in the fastener socket before applying torque to avoid rounding the drive recess. De-energize equipment and follow applicable lockout/tagout procedures before servicing any fasteners on electrical or mechanical systems. Inspect the tool for wear or damage before each use and replace if the hex end shows deformation.