Proto J5336MCF Open End Crowfoot Wrench Metric

Product Description

The PROTO J5336MCF is a metric open end crowfoot wrench finished in chrome plating. Crowfoot wrenches attach to a standard ratchet or extension bar via a square drive, allowing access to fasteners in tight or recessed locations where a conventional open end wrench cannot reach. The chrome finish provides corrosion resistance for long service life in shop and field environments. This tool measures 3.4 inches in overall length and weighs 0.53 pounds, making it a compact addition to a professional socket set. It is designed for use by mechanics, HVAC technicians, plumbers, and other trade professionals who regularly work in confined spaces.

The J5336MCF is suited for general mechanical service work where metric fasteners must be torqued or loosened in restricted areas. Typical applications include equipment maintenance, piping connections, and mechanical assembly tasks where a standard wrench or socket cannot engage the fastener directly. The open end jaw profile accepts a flat-sided fastener head without requiring axial access, making it especially useful on installed components.

Key Features

• Open end crowfoot design attaches to standard ratchet handles and extension bars via square drive
• Metric sizing for use with metric fastener specifications
• Chrome plating provides corrosion resistance and a cleanable surface finish
• Compact overall length of 3.4 inches for use in tight spaces
• Covered by a Limited Lifetime Warranty from PROTO

Compatibility

Designed as an OEM-style replacement or addition compatible with standard square drive ratchets and extension bars sized to match this crowfoot wrench series.

Installation Notes

Ensure the square drive of the ratchet or extension bar is fully seated in the crowfoot drive socket before applying torque. Do not use crowfoot wrenches with extensions at angles that exceed tool manufacturer guidance, as off-axis loading can damage the drive connection. Inspect the open end jaw for wear or deformation before each use. This tool should be used by qualified trade professionals familiar with proper torque tool handling.