Proto J49004CF 9-pc Crowfoot Wrench Set 3/8 in Drive

Product Description

The PROTO J49004CF is a 9-piece open end crowfoot wrench set designed for 3/8 inch drive ratchets and extensions. It covers fasteners from 3/8 inch through 7/8 inch in standard SAE sizes, giving technicians a compact set for reaching nuts and fittings in tight or obstructed spaces where a standard open-end wrench cannot seat. Crowfoot wrenches are a standard tool in HVAC, plumbing, and mechanical service work, particularly when accessing hard-to-reach fittings on refrigerant lines, fuel lines, and hydraulic connections. The set weighs 1.1 pounds, making it easy to carry in a service pouch or tool bag.

This crowfoot set is suited for residential and light commercial service applications. Technicians use crowfoot wrenches when working around valve bodies, union fittings, and compression connections where clearance prevents a box or combination wrench from engaging. The 3/8 inch drive compatibility means the set works with the most common mid-size ratchets and torque wrenches already in a service technician's kit, allowing controlled torque application on sensitive fittings.

Key Features

• 9-piece set covering 3/8 inch to 7/8 inch SAE open end sizes
• 3/8 inch drive compatibility for use with standard ratchets, extensions, and torque wrenches
• Open end crowfoot design accesses fasteners in restricted or obstructed spaces
• Compact set weight of 1.1 pounds for easy portability in a tool bag or pouch
• Consistent sizing increments across the range for complete fastener coverage in typical SAE service work

Compatibility

Designed as a standard 3/8 inch drive crowfoot wrench set suitable for use with any 3/8 inch drive ratchet, torque wrench, or extension bar in typical SAE mechanical service applications.

Installation Notes

Crowfoot wrenches are installed by licensed HVAC technicians, plumbers, and mechanical service professionals. Before using on any fitting, ensure the system is depressurized, de-energized, or shut off as required by the relevant service procedure. Seat the crowfoot squarely on the fastener before applying torque to avoid rounding. When using with a torque wrench at an angle offset from zero degrees, apply the appropriate torque correction factor per standard mechanical practice.