Paramount PAR37116 Hex Key 1/2 Inch Long Arm

Product Description

The PARAMOUNT PAR37116 is a long-arm hex key with a 1/2 inch hex size, designed for high-torque fastener driving in trade and industrial applications. Built from Protanium High Torque Steel, this tool delivers the torsional strength needed for heavy-duty fastener work without rounding out drive sockets. The long arm style provides extended reach into recessed fastener locations and generates greater torque leverage compared to standard-arm versions. At 8-19/64 inches overall length, it fits hand-tool pouches and service kits used by HVAC technicians, plumbers, electricians, and general mechanical contractors.

This hex key suits applications requiring a 1/2 inch internal hex drive, commonly found on set screws, shaft collars, pipe fittings, equipment covers, and mechanical assemblies across HVAC, plumbing, and electrical installations. The long arm configuration is particularly useful when working in tight or deep access points on equipment frames, fan assemblies, or valve bodies. It is a single-piece, inch-measurement tool intended for professional service environments where fastener integrity and tool durability are priorities.

Key Features

• Protanium High Torque Steel construction for maximum torsional strength and wear resistance
• 1/2 inch hex size with hex end type for direct socket-head fastener engagement
• Long arm style provides extended reach and increased torque leverage
• 8-19/64 inches overall length fits standard tool pouches and service kits
• Gray handle finish for quick visual identification in multi-key sets
• Inch measurement system; compatible with standard inch-spec fasteners

Compatibility

Designed for use with 1/2 inch internal hex socket-head fasteners in inch-specification mechanical assemblies commonly found in residential and commercial HVAC, plumbing, and electrical equipment.

Installation Notes

This tool is installed and used by any licensed trade professional performing equipment service or assembly. Before using a hex key on powered equipment, de-energize electrical systems and isolate fluid systems as required by applicable safety procedures. Do not apply pipe extensions or cheater bars to hex keys, as this can exceed the tool design load and cause failure. Inspect the hex tip for rounding or wear before each use to avoid damaging fastener sockets.