Proto J3144 Open End Wrench 1-3/8 in Double End Chrome

Product Description

The PROTO J3144 is a double-ended open end wrench designed for 1-3/8 inch fastener sizes. The head features a dual-angle design with 15-degree and 60-degree offsets, giving technicians access in tight spaces where a straight approach is not practical. The wrench is constructed from steel with a chrome-plated finish that resists corrosion and simplifies cleanup in shop environments. At 1.41 pounds, the J3144 delivers solid feel without unnecessary bulk. It meets GGG-W-636E federal specification standards and carries a lifetime warranty, making it a reliable choice for any professional tool inventory.

The PROTO J3144 is suited for mechanical, industrial, and maintenance trade work where standard open end wrenches are required on 1-3/8 inch fasteners. The dual head angles serve technicians working on equipment with limited clearance, such as plumbing fittings, HVAC components, or structural hardware. The chrome finish holds up under routine shop use and is appropriate for both bench work and field service. This wrench is a single-unit purchase with a package quantity of one.

Key Features

• Double-ended head with 15-degree and 60-degree head angles for versatile fastener access
• Fits 1-3/8 inch fasteners with a head width of 2-37/64 inches
• Chrome-plated steel construction for corrosion resistance and easy cleaning
• Meets GGG-W-636E federal specification for wrenches
• Backed by a lifetime warranty
• Weighs 1.41 pounds with an overall length of 13.7 inches

Compatibility

Designed as an OEM-style replacement or direct-use open end wrench for 1-3/8 inch fastener applications in mechanical, HVAC, plumbing, and industrial maintenance settings.

Installation Notes

The J3144 is a hand tool intended for use by licensed tradespeople and qualified mechanics. No power source is required. Select the correct head angle for the clearance available before applying torque to avoid fastener rounding. Inspect the wrench for cracks or deformation before each use and do not use it as a striking tool or extend it with a cheater bar.