Wiha 66994 Metric Ball End Hex Key Set 9 Piece

Product Description

The WIHA 66994 is a 9-piece metric ball end hex key set built for trade professionals who need reliable, precise fastener access in tight or angled spaces. Each key features an L-handle design with a ball end tip, allowing up to 25 degrees of angular engagement without removing the key from the fastener. The set covers nine metric sizes from 1.5 mm through 10.0 mm, making it well-suited for mechanical assembly, equipment service, and precision fastener work across HVAC, electrical, and plumbing equipment installations. The full set weighs 0.98 pounds and overall key length reaches 9.5 inches.

This hex key set is intended for use on metric socket head cap screws and set screws found in commercial and residential mechanical equipment. Common applications include motor mounting hardware, panel fasteners, valve actuator assemblies, and equipment access covers. The ball end tip is particularly useful when bolt access is not straight-on, such as in confined equipment cabinets or multi-component assemblies. The L-handle format provides two engagement points per key: the short leg for torque and the long leg for speed.

Key Features

• Ball end tip allows angled fastener access without removing the key from the socket
• L-handle design provides both torque leverage and rapid spin capability
• 9-piece metric set covers 1.5 mm, 2.0 mm, 2.5 mm, 3.0 mm, 4.0 mm, 5.0 mm, 6.0 mm, 8.0 mm, and 10.0 mm
• Overall key length of 9.5 inches for reach in deeper fastener locations
• Lightweight set at 0.98 pounds for portable field use

Compatibility

Designed for use with metric socket head cap screws and set screws across a wide range of mechanical, HVAC, electrical, and plumbing equipment that uses metric fasteners in the 1.5 mm to 10.0 mm range.

Installation Notes

This tool is appropriate for use by licensed HVAC technicians, electricians, plumbers, and mechanical service professionals. Always de-energize and lock out equipment before servicing fasteners on electrical enclosures or live mechanical assemblies. Use the short leg of the L-handle for final torque and the long leg for faster initial driving. Do not use the ball end for final high-torque tightening, as angular engagement reduces torque capacity.