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The PROTO J3318 is a double-ended open end wrench sized at 9/32 inch, built for professional tradespeople who need a reliable hand tool for fastener work in tight or standard access areas. Constructed from steel with a satin finish, this wrench features a double end head design with two head angles — 15 degrees and 75 degrees — giving the technician two offset options in a single tool. The satin finish reduces glare and resists corrosion in typical shop and field conditions. It is compact enough for light-duty fastener applications and is backed by a lifetime warranty.
The J3318 is suited for use in HVAC, plumbing, electrical, and general mechanical service where 9/32 inch fasteners are common. The dual head angle configuration makes it practical for both open-access and offset fastener positions, reducing the need to carry multiple wrenches for the same fastener size. It is a standard addition to a service technician toolkit where a slim, fixed-size open end wrench is preferred over an adjustable alternative.
Designed as a standard open end wrench for use with 9/32 inch fasteners in general trade and mechanical service applications.
This wrench is used by hand and requires no power tools or specialty equipment. Ensure the correct jaw opening is seated fully on the fastener before applying torque to avoid rounding the fastener head. Select the 15-degree or 75-degree end based on available clearance around the fastener. Follow applicable safety practices when working near energized equipment or pressurized systems.
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