Proto J4940CF Open End Crowfoot Wrench 1-1/4 Inch

Product Description

The PROTO J4940CF is a 1-1/4 inch open end crowfoot wrench designed for accessing fasteners in confined spaces where a standard open-end wrench cannot reach. The crowfoot head attaches to a standard 3/8 inch drive ratchet or torque wrench, making it a practical addition to any professional tool kit. The head measures 2.156 inches in diameter and 0.38 inches thick, keeping the profile low for tight clearances. A chrome-plated finish provides corrosion resistance for long service life in shop and field conditions.

This crowfoot wrench is used across trades wherever a 1-1/4 inch fastener must be turned in a restricted or angled location. Common applications include HVAC equipment service, plumbing line connections, and mechanical assembly work where open-end access is required but a full wrench swing is not available. The 3/8 inch drive compatibility makes it easy to pair with existing ratchets, extensions, and torque wrenches already in a technician's kit.

Key Features

• 1-1/4 inch open end size fits standard hex fasteners and fittings
• Low-profile head at 0.38 inches thick for tight clearance applications
• 2.156 inch head diameter for proper socket drive engagement
• Chrome-plated finish for corrosion resistance and easy cleaning
• Lifetime warranty backed by the manufacturer
• Attaches to standard 3/8 inch drive ratchets and torque wrenches

Compatibility

Designed for use with standard 3/8 inch drive ratchets, extensions, and torque wrenches. Fits 1-1/4 inch open-end fastener applications across HVAC, plumbing, and mechanical service work.

Installation Notes

Ensure the drive tool and crowfoot are fully seated before applying torque to prevent rounding the fastener or damaging the tool. When using with a torque wrench at an angle offset from the fastener centerline, consult torque correction factor guidelines to maintain accurate torque values. Inspect the chrome finish and drive socket for wear or damage before each use. This tool is intended for hand-tool use only and should not be used with impact drivers.