Proto J49003CF 15 Pc Crowfoot Wrench Set 3/8 Drive

Product Description

The PROTO J49003CF is a 15-piece, 3/8 inch drive open end crowfoot wrench set covering fractional sizes from 3/8 inch through 1-1/4 inch. Each crowfoot fits a standard 3/8 inch drive ratchet or extension, allowing access to fasteners and fittings in tight or recessed locations where a standard open-end wrench cannot reach. The chrome finish provides corrosion resistance for shop and field use. The set meets ASME B107.6 standards for hand tools and stores on an included clip rail for organized access at the workbench or in a tool chest.

This set is suited for HVAC technicians, plumbers, and pipefitters who regularly work on refrigerant line fittings, compression fittings, valve packing nuts, and similar hardware in confined spaces. The 15-size range accommodates a wide span of fractional inch fasteners common in residential and light commercial mechanical systems. The clip rail keeps all pieces indexed and visible, reducing time spent locating individual sizes during service calls.

Key Features

• 15-piece set spanning 3/8 inch to 1-1/4 inch in fractional increments
• 3/8 inch drive interface compatible with standard ratchets and extensions
• Open end crowfoot profile accesses fittings in restricted areas
• Chrome finish for corrosion resistance and easy cleaning
• Meets ASME B107.6 hand tool standards
• Clip rail storage included for organized, at-a-glance access

Compatibility

Designed for use with any standard 3/8 inch drive ratchet, breaker bar, or torque wrench. Fractional sizes 3/8, 7/16, 1/2, 9/16, 5/8, 11/16, 3/4, 13/16, 7/8, 15/16, 1, 1-1/16, 1-1/8, 3/16, and 1-1/4 inch are included.

Installation Notes

Crowfoot wrenches are installed on the drive tool at a 0-degree or 15-degree offset depending on torque requirements — consult the torque wrench manufacturer guidelines when applying measured torque at an offset. Ensure the crowfoot is fully seated on the drive square before applying load to prevent slipping. Inspect each crowfoot for cracks or wear before use on pressurized fittings.