Wiha 66992 22-piece L-key Combo Hex Key Set Inch Metric

Product Description

The WIHA 66992 is a 22-piece L-handle hex key set combining both inch and metric sizes with ball-end tips on every key. Built from Chrome Vanadium Molybdenum steel, these keys are engineered for durability under the torque demands of professional fastener work. The L-handle format provides leverage for driven fastening and a short-arm option for tight clearances. Ball-end tips allow off-axis engagement up to approximately 25 degrees, useful when straight access to a socket-head cap screw is blocked. The set covers a broad size range, making it practical for technicians who work across both imperial and metric fastener standards without carrying two separate sets.

The 66992 is suited for HVAC, mechanical, plumbing, and electrical service work where hex-drive fasteners appear on equipment panels, motor mounts, valve assemblies, and electrical enclosures. The plastic holder keeps all 22 keys organized and accessible on a service vehicle or shop bench. This set handles both standard hex fasteners and socket screws in residential and light commercial applications.

Key Features

• 22 keys cover metric sizes from 1.5 mm to 10 mm and inch sizes from 3/8 to 1/2 inch
• Ball-end tips on every key for off-angle fastener access
• Chrome Vanadium Molybdenum steel construction for strength and corrosion resistance
• L-handle format delivers high torque on the long arm and precise control on the short arm
• Compatible with standard hex fasteners and socket head cap screws
• Plastic holder stores and organizes all 22 pieces

Compatibility

Designed for use with standard hex and socket head cap screws in both inch and metric sizes, suitable for HVAC, plumbing, electrical, and general mechanical service applications.

Installation Notes

No power-down or system shutoff is required for hand tool use, but always follow lockout/tagout procedures when working on energized or pressurized equipment. Use the long arm for initial fastener engagement and the short arm for final torque to reduce the risk of fastener damage. Inspect keys periodically for rounding or wear and replace any key that shows deformation.