Proto J5321MCF Open End Crowfoot Wrench Chrome Metric

Product Description

The PROTO J5321MCF is a metric open end crowfoot wrench designed for use in confined spaces where a standard wrench or socket cannot reach. The crowfoot head attaches to a standard 3/8-inch or compatible drive ratchet or extension bar, allowing torque to be applied to fasteners with limited clearance. The chrome-plated finish provides corrosion resistance and makes wiping down the tool straightforward between jobs. At 2.6 inches overall length and 0.28 pounds, it is a compact, lightweight addition to a professional toolbox. This tool is used by mechanics, HVAC technicians, plumbers, and other trade professionals who regularly work in tight access areas.

The J5321MCF is suited for automotive, industrial, HVAC, and general mechanical service applications where metric fasteners require torque in restricted locations. The open end crowfoot design allows it to work on hex fasteners, flare nuts, and fittings that are not accessible with a conventional wrench. It is intended for use with a drive ratchet or torque wrench, making it particularly useful when precise torque application is required during assembly or service.

Key Features

• Chrome-plated finish resists corrosion and simplifies cleaning
• Metric system of measurement for compatibility with metric fasteners
• Compact 2.6-inch overall length designed for tight-clearance work
• Lightweight at 0.28 pounds for reduced hand fatigue during extended use
• Attaches to standard drive ratchets and extensions for torque application
• Backed by a limited lifetime warranty

Compatibility

Designed as an OEM-style crowfoot wrench for use with standard drive ratchets and torque wrench extensions in metric fastener applications.

Installation Notes

Install and remove using a calibrated torque wrench or ratchet with the appropriate drive size. Ensure the crowfoot head is fully seated on the fastener before applying torque to prevent rounding. Do not use extension bars or adapters that exceed the rated capacity of the drive system. Always verify the fastener specification before applying final torque.