Proto J3111M Open End Wrench 11 Mm Double Ended

Product Description

The PROTO J3111M is a double-ended open end wrench designed for professional-grade fastener work in mechanical, HVAC, plumbing, and electrical applications. It features two open ends set at 15-degree and 60-degree head angles, giving technicians the flexibility to access fasteners in tight or awkward spaces without repositioning the workpiece. The wrench is machined from steel with a chrome-plated finish that resists corrosion and simplifies cleanup in the field. At 0.09 pounds, it is light enough for all-day carry on a tool belt without adding bulk.

This wrench is suited for any trade professional who works with metric fasteners in the 11 mm range. Common applications include equipment panel work, refrigerant line fittings, condensate line hardware, electrical enclosures, and general mechanical assembly. The dual-angle head design makes it practical in confined installations such as equipment closets, plenum spaces, and mechanical rooms where a single-angle wrench may not clear surrounding components.

Key Features

• Double-ended open end head fits 11 mm fasteners on both ends
• 15-degree and 60-degree head angles for access in restricted spaces
• Chrome-plated steel construction for corrosion resistance and durability
• Head width of 45/64 inches for consistent fastener engagement
• Meets GGG-W-636E federal specification for hand tools
• Backed by a lifetime warranty

Compatibility

Designed as a standard metric open end wrench suitable for 11 mm fasteners across a wide range of mechanical, HVAC, plumbing, and electrical equipment.

Installation Notes

This wrench is intended for use by licensed or experienced trade professionals performing fastener work on mechanical systems. Always de-energize electrical equipment and shut off fluid or refrigerant supply before loosening or tightening fittings. Select the correct head angle to clear adjacent components and avoid rounding fastener flats. Inspect the chrome finish periodically and replace the tool if the head shows visible deformation or cracking.